From Zelda Legends Wiki
A symmetrical town, located to the west of the Nuun Highlands, in Labrynna. If something is on one side of the town, it will have a twin on the other side, whether it is a house, tree, or volcano. Level 4, the Skull Dungeon, is located here, in the past. If the symmetry is broken the volcanoes will go out of control and destroy the village. Symmetry City is destroyed in the present until you save it in the past.