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The Forbidden Land, Eureka is an optional dungeon in the game Final Fantasy III which contains some of the best equipment in the game. A gateway to it can be found at the bottom floor of the Crystal Tower, but the Eureka Key is required. Doga and Unei unlock the Eureka Key, and give it to the Warriors of the Light, granting them access to Eureka, knowing they need better equipment to fight Xande. This equipment was sealed away long ago because considered too powerful for humans to behold.

In the original NES version, the Sage and Ninja jobs are found in this dungeon, being given to the player once they have defeated Scylla.


Finding the Moonring Blade.

Item Location
Fuma Garb First Area
Chocobo's Wrath First Area
White Musk First Area
Elixir First Area
White Musk Right room at Second Area
Chocobo's Wrath Right room at Second Area
Phoenix Down Right room at Second Area
White Musk Left room at Second Area
Ribbon Second Area (Middle), guarded by Ninja
Shuriken Southwestern room on Second area
Elixir Third Area
Shuriken Third Area
Phoenix Down Third Area
Moonring Blade Fourth Area, guarded by Amon
Omnirod Fifth Area
Masamune Fifth Area, guarded by Kunoichi
Phoenix Down Fifth Area
Excalibur Sixth Area, guarded by General
Elder Staff Seventh Area, guarded by Scylla
Ragnarok Seventh Area, guarded by Guardian
Elixir Eighth Area
Shuriken Eighth Area
Elixir Eighth Area
Shuriken Eighth Area


The shops of Eureka.

In the final area of Eureka, the player can find three shopkeepers (one of whom is reached via a hidden passage) selling some of the best spells, summons, and equipment in the game. This is also the only place where Shuriken can be purchased, though at a ridiculously high price.

Magic Shop[]

Item Famicom cost 3D cost
Flare 60,000 gil
Death 60,000 gil
Meteor 60,000 gil
Tornado 60,000 gil
Arise 60,000 gil
Holy 60,000 gil

Summon Shop[]

Item Famicom cost 3D cost
Catastro 45,000 gil 40,000 gil
Leviath 55,000 gil 50,000 gil
Bahamur 65,000 gil 60,000 gil

Hidden Shop[]

Hidden from plain view. (Found by walking to the right, through the wall on the screen where the other two shopkeepers stand.)

Item Famicom cost 3D cost
Shuriken 65,000 gil
Crystal Shield 50,000 gil
Crystal Mail 65,000 gil 50,000 gil
Crystal Gloves 50,000 gil
Crystal Helm 50,000 gil
Apollo Harp N/A 60,000 gil


The optional bosses fought here are a manifestation of the weapon they are protecting.

Battle background[]


Musical themes[]

"The Forbidden Land, Eureka" from Final Fantasy III (3D)

Eureka has its own exclusive background theme, originally titled as "Forbidden Land" (禁断の地エウレカ, Kindan no Chi Eureka?) in the Original Sound Version, and was titled as "The Forbidden Land, Eureka" in the Original Soundtrack. It is available as a battle background music for Dissidia 012 Final Fantasy as part of a downloadable content pack of three tracks from Final Fantasy III. It is also a Field Music Sequence in Theatrhythm Final Fantasy All-Star Carnival.

Other appearances[]

Final Fantasy XIV[]

Added in Patch 4.25 "Rise of a New Sun," The Forbidden Land, Eureka, is an instanced area that up to 144 players can explore simultaneously. Though it pulls from Final Fantasy III in its name and in the concept of an extensive side area you can explore, the plot primarily includes references to Final Fantasy V. The player works with Krile to find out what happened to the Students of Baldesion after the disappearance of the Isle of Val, complete with flashbacks involving her grandfather.

Final Fantasy Tactics[]

This once prosperous capital of the Kashka Dynasty was destroyed in the Cataclysm, along with the vast legacy of its royal family. It is now a necrohol, populated by spirits drawn to the shades of its past glory.

The Forbidden Land Eureka.

The Forbidden Land Eureka was mentioned as one of the wonders.

Final Fantasy Airborne Brigade[]

Eureka2 Battle Brigade.png
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Final Fantasy Record Keeper[]

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Other media[]

Dissidia 012 Final Fantasy has a trade material called "Eureka Metal".



Eureka is an interjection used to celebrate a discovery or invention. "Eureka" comes from the Ancient Greek word εὕρηκα heúrēka, meaning "I have found (it)".