Lost City of SomeTribe

Wanmami Island’s lost city is an archaeological site, the remains of a lost culture. Surrounded by thick jungle, the ruined temple is especially grand and ominous.
Lost City of SomeTribe is a very large community lot in the heart of Wanmami Island, one of the neighborhoods shipped with The Sims Castaway Stories. Like all community lots, it can be visited by using the travel map. There are some Singing Stones and a fountain on the lot. If the Sim pours some soap in the fountain, the volcano will get angry, and will pour lava out of the fountain, lowering the Sim's Hunger and Bladder motives by scaring the Sim.
If the lot is indeed 100x100 squares, it is the biggest lot in the Sims franchise by far and beyond, as all mainline Sims games have a hard cap at 64x64 that can't be bypassed even with known mods.