Eridessa Falls

is a cave in southeastern Torran located beneath the Starlight Dam in Riamistad Town. The eastern tributary of Scorpio Creek splits into several channels that flow through the cavern's various levels before converging at the eastern entrance where they flow onto.

Legend states that the cave was created by a legendary Pokémon from the stars who crashed into Stardust Citadel and caused it to erupt thousands of years ago; a massive chunk of ejected lava crashed into the river near Riamistad town and cooled, with the river (as well as various wild Pokémon) eventually digging its way through the rock and carving out the cave's interior.