Lemurian Palace

https://en.wikipedia.org/wiki/Unorganised_sector_(India)

The Lemurian Palace was an ancient fortress on Cortex Island built by the Lemurians to protect the ancient power gem caverns. The construction of the palace was overseen by the emperor Gutemosk, and the palace stood for nearly two millennia until it was refurbished with modern technology by Neo Cortex in the early 1990s. Initially, the Cortex Corporation tried to demolish the palace but had found it too difficult. Parts of the palace were destroyed in various explosions following the Battle of Cortex Castle, but much of the structure still stands today. It is currently an Unorganized Sector of the Wumpa Islands, and access to the palace is highly restricted by the Wumpian Initiative.