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Valka Castle is a sub area in Endless Ocean 2, and the fourth playable map in the game. It is a 16th-century stone castle that ended up hidden in the waters of Ciceros Strait, after "sinking" several hundred years ago. It is known as a greatly popular salvaging location, with glamorously designed chambers and corridors. It is on this map where the player is first prompted and taught to use the Underwater Pen, although they will gain access to that tool shortly after Chapter 1.

Valka Castle is the only map in the game to not have its default theme music play upon entry; instead, it won't play until the player starts to swim up the Spiral Tower. During the player's first visit, however, Celtic Woman's "Nella Fantasia" will play in the background, once again not until they enter the Spiral Tower. Following the completion of Chapter 2, the song will become available on Nineball Island's jukebox, assuming the player has already purchased it from Nancy.

In-Game Description

Dive Description

"Priceless medieval ornaments and works of art still adorn this sunken castle, just as its stone walls house many secrets and legends."

Notebook Description

"Prince Valka, a powerful Eastern European aristocrat of the Ottoman Dynasty, erected Valka Castle in the 16th century. Records say that this splendid and luxurious castle was built on a small island in the Aegean, but at some point during the 18th century, the castle sank into the sea overnight.

The exact location of this mysterious castle was unknown until L&L Diving Service discovered it."

Flora, Fauna, and Geography

Local Life

Valka Castle is mostly devoid of flora, such as coral. Interestingly, no algae can be seen around the castle, despite it being an environment where it would typically flourish underwater.

A false killer whale can be seen here in the Mermaid's Ballroom, alongside several swallowtail sea perch, mahi-mahi, and other species of fish.

In the way of other sea life, however, the halls and chambers of Valka Castle are abundant with rich and colorful creatures. Spiral Tower, notably, is home to the castle's only scalloped hammerheads, who reside near the top.

Each of the small chambers within the castle contains various species of fish, such as meagre, longtooth grouper, red cornetfish, and more. In particular, fish such as blue-green chromis, lined surgeonfish, and bicolor parrotfish are plentiful throughout many parts of the castle. The inner halls and corridors of the castle contain life such as luna lionfish, blue-spotted ribbontail rays, red stingrays, and clown wrasse, who can be commonly seen near the Underwater Gallery.

Thanatos can commonly be seen swimming around outside of most windows of the castle during the day. When the player has completed the Voice of the Night Sky sub-quest "Solar System", they can see the prehistoric Anomalocaris swimming outside the windows of the Gallery during the day.

Under zoom-mode glow spots, smaller fish such as cardinal fish, young clown wrasse, young harlequin sweetlips, and several species of sea slug such as Berthella aurantiaca, luminescent sea slugs, and branched sea slugs. Other zoom mode species include the jellyfish Turritopsis nutricula, mauve stingers, young or even egg-form blotchy swell sharks, and the legendary Ailouros Pearl.

Location and Geography

Valka Castle can be accessed through the Well of the Full Moon, which is located in the ruins of Triton Village; however, the player can only reach these ruins at night, after the raging whirlpools that enclose it have settled.

The flat map of the circular earth.

The architecture and design of this castle stands out amongst other locations in Blue World, as it is one of only two purely man-made diving areas in the game, the other being the Cavern of the Gods. Constructed primarily out of stone and glass, it contains a large tower, several small chambers used for purposes such as storage, a rich, life-filled gallery, and a grand ballroom.

The castle also houses much ancient furniture and paintings of note -- in particular, a "flat map of the circular earth" (see right) that serves as a major plot point, and a portrait of Prince Valka himself. The castle also notably features several cleverly-designed locking mechanisms likely meant to thwart thieves.


Well Bottom

This unremarkable corridor consists entirely of bland stone and a sandy, rocky floor. It is a small passageway on the western side of the map that leads into Spiral Tower, via a left-facing corner. The player begins here when they enter the Well of the Full Moon, and, by extension, Valka Castle itself, and can also swim back up here to exit Valka Castle.

Spiral Tower

Spiral Tower, as viewed from its bottom. Up ahead, meagre and scalloped hammerheads can be seen swimming.

Located at the end and to the left of the Well Bottom, this uniquely structured, tall tower is filled with several fish, such as lined surgeonfish, meagre, and the castle's only scalloped hammerheads at the top. Common octopuses can be found at the bottom. There are two passages located within this tower, on its second floor: one going north and one going east. The northern one leads to the rest of the castle, whereas the eastern one leads to the Collapsed Gallery. A befriendable false killer whale is briefly encountered near the top of this area.

Collapsed Gallery

This is the passage going east in the Spiral Tower. It leads to a dead end that's nothing but a collapsed mess of rubble, but there are still some interesting coral reef fish here, as well as a large barrel that can be found upon use of the Multisensor. Most of the time, this will be an empty oil drum.


As its name suggests, this is where soldiers kept their armor during the castle's heyday. Blue-green chromis and a longtooth grouper are seen here, as well as some creatures under a zoom-mode glow spot.

Treasure Vault

This is where treasure was kept. Blue-green chromis and meagre are found here. The first time it is visited, it will be locked, but divers will notice a hole large enough for Oceane to squeeze through (who will be with the player during their first visit), and she will open the door from within. Entering this room is necessary on two separate occasions: once during the "Be the Best Trainer" quest, as it serves as one of the false killer whale's hiding spots, and another time to grab the Servant's Ring quest item, necessary for discovering the Golden Catfish.

Underwater Gallery

This is an open, lengthy corridor, filled with large windows through which light streams freely. Here, there are fish of all shapes, colors, and sizes, ranging from large longtooth groupers and clown wrasse down to smaller harlequin sweetlips. Thanatos is also seen lurking outside the windows occasionally, and, later, the Anomalocaris is seen outside of here too.

Mermaid's Ballroom

Mermaid's Ballroom, featuring a false killer whale and collapsed chandelier.

A giant, glorious ballroom where people had danced when the castle was above water, it is still a perfectly useable ballroom--for fish to dance and swim in. and even a false killer whale are found here.

A luna lionfish guards the throne that sits against the easternmost wall under an awning, but it can be moved aside by drawing with the underwater pen. Doing this will expose the Glorious Key, which opens the door to the King's Chamber.

The Ailouros Pearl can be found under a zoom-mode glow spot in front of the throne provided they are partnered with Oceana, and the Phantom can be seen here at night (only after beating the main plot). Thanatos can be seen outside of the windows here as well. In addition, the scarred false killer whale ends up here when the player finally befriends it.

Just outside the ballroom, there is a door that is locked on the other side, but can be opened on the side the diver is currently at.

King's Chamber

This is the chamber in which the mighty Prince Valka resided. It is opened by using the Glorious Key. It has a portrait of Prince Valka himself on the wall, which gives a clue about how to open the Secret Room.

Secret Room

A small room connected to the King's Chamber. It is opened by moving the book entitled Clavis (key in Latin). There are many cloudy catsharks on the floor here, as well as a few salvageable items.

Story Significance

Warning.png Spoilers for Endless Ocean 2 ahead!

Valka Castle is one of the most important areas in Blue World, holding not only many secrets and treasures that prove to be a valuable aide in the quest for the Pacifica Treasure (such as the Okeanos Tablet and flat map of the circular earth), but also serving as an area that hosts many legendary creatures, quest plot points, salvage requests, and more. The castle serves as the fourth main area explored in Blue World, following Gatama Atoll, Deep Hole, and Ciceros Strait, and is a crucial turning point in L&L Diving Service's quest for the truth behind the Song of Dragons.

During the main storyline, the player and Oceana first discover the castle by complete accident, having swum down the Well of the Full Moon to escape Thanatos, who was ambushing them in Triton Village. While exploring it, the pair makes their way through the Underwater Gallery and into the decorous Mermaid's Ballroom, where they find a throne against the east wall and a closed - but unlocked - door; opening this door leads to a smaller room with two locked doors. One of them can be unlocked from this side, and leads to a room near the entrance; the other is a set of double-doors that is locked tightly. The player and Oceana must retrieve a key called the Glorious Key in order to enter here; however, the key sits on the throne, 'guarded' by a lone luna lionfish.

The door to the Secret Room opening.

After luring the lionfish away with food or the underwater pen and retrieving the key, the player and Oceana enter the King's Chamber to investigate. Eventually, an inspection of the portrait of Prince Valka on the wall offers a hint that leads to the discovery of a single, intact volume on the bookshelf on the opposite wall. Tellingly, this book is titled "Clavis", the Latin word for "key".

The player character pulls on the tome to reveal a hidden bookcase door that swings open. The moment this occurs, however, the Song of Dragons also plays, and the door to the King's Chamber itself swings shut as a result, locking them inside. After the player finds the Okeanos Tablet in pristine condition in the Secret Room, they realize that Prince Valka must have visit this place frequently - and so must have had a way to reset the trap from inside the room.

Upon taking a closer look at the desk, it turns out that there's a lever beneath it. Pulling on the lever itself does nothing, but it does seem to move some mechanism in the door; the player and Oceana must pull the lever beneath the desk and pull on the door simultaneously to open it again. At that point, a North Atlantic right whale swims past the window of the King's Chamber, presumably the one responsible for singing the Song of Dragons.

The player and Oceana leave with their newfound treasure: the Okeanos Tablet found in the Secret Room - and the mysterious writing upon it. News of their discovery subsequently spreads around the world, earning L&L Diving Service some extra exposure and unlocking the ability to take Diving Guide and Photo Requests.

In-Game Dialogue
Prior to the player's first expedition to the Triton Village Ruins, Jean-Eric gives them an overview of the information that L&L Diving Service has gathered so far.

"The legendary Valka Castle is said to be somewhere in Ciceros Strait. However, despite the best efforts of many who have looked, it has never been found.

We decided to search for clues instead of the castle itself, and we found out that the whirlpools may disappear at night. The whirlpools are most active in southwest Ciceros Strait. Triton Village, which was carved on the bracelet we found, sank in that exact area.

Fortunately, we have the equipment needed for night diving, so we should concentrate our search in the southwest of Ciceros Strait.

That's it, I think. Do you want me to go through it again?"

The player can ask Jean-Eric to repeat this information. If they decide not to, he'll move on and tell the player that they can sleep on the boat to advance time.

When the player and Oceana first reach the Well Bottom, Oceana is greatly relieved to be out of the way of Thanatos.

"We should be safe down here. It looks like we're going to be all right! I wonder if there's any chance that shark will just give up and go home? Just to be on the safe side, I'll share my air with you."

At this point, the player's air is refilled. Oceana continues:

"You know… Isn't this really long and deep for a well? It looks like it goes on forever… This is really strange. It's like an underground passage down here.

Wait a minute…

What if this well is actually a secret entrance to the legendary Valka Castle!

Come on! Let's go deeper and find out!"

When the player and Oceana make their way up the Spiral Tower and into the first corridor of Valka Castle main, Oceana is overjoyed.

"Look at this place! It has to be the legendary Valka Castle!

Grandpa! We found it! Can you hear me?"

Jean-Eric answers.

"I can, but just barely. The reception is terrible. But it sounds like you've found what you were looking for! Nice work!"

Oceana thinks out loud for a few moments.

"My dad must have been searching for this castle too! Could he be trying to tell us to find that treasure? The one that GG was talking about? Let's look inside the castle and see what we can find."

Jean-Eric suggests proceeding with heightened awareness of the surrounding area.

"Wait a second! This is your first confined-space dive with an overhead environment. You're in a very old structure, so proceed with the utmost caution."

The player and Oceana can then continue exploring, after a quick tutorial on how to use the Underwater Pen as a potential way to keep track of the exit.
Warning.png Spoilers for Endless Ocean 2 end here.


  • Valka Castle is one of only two sub-areas in the game to house a resident dangerous creature that is found day and night; in this case, that creature would be the luna lionfish.
  • Interestingly, the player can surface at the top of the Spiral Tower, revealing that a bit of the castle sticks above the surface. How this went unnoticed until L&L Diving Service discovered the castle is unknown.
  • Valka Castle is the first map in the game to house a legendary creature that is locked behind story completion.
  • Valka Castle is the only sub-map to contain the same number of legendary creatures as its main map.
    • It is also one of just two sub-maps to contain more than one legendary, the other being the Cavern of the Gods.
  • Valka Castle is one of three maps in the game where all of its legendary creatures cannot appear on the map at the same time, the other two being the Weddell Sea and the Cavern of the Gods.
  • The name Valka means "healthy" in Latin, which is ironic, considering the current state of the castle.
  • While trapped, your air level cannot go down.