Minax Ruins

In Ultima Online, the Minax Ruins are located in the Lost Lands, just south of the town of Papua.

Description
The ruins once had been the stronghold of the followers of Minax, but they had been forced to abandon it, as the fortress area turned out to be a void where teleportation and gate spells couldn't be cast. They left behind the empty fortress, which fell into ruin and now is little more than a rubble field with not much left in terms of lootable items. Basically, it's just a place for sightseeing.