Camelot is famous castle and court associated with King Arthur and the capital of his kingdom.
Koza'Rai banished Ray Stantz to Camelot in Arthurian times. He settled rather well and became a friend of Arthur. Ray was in constant battle with Flame Dragon Ghosts. These entities eventually ravaged Camelot and kidnapped its citizens. From his laboratory in Camelot, Ray formulated a strategy to save them but was soon reunited with Peter Venkman and introduced to Rachel Unglighter.