Trinidad and Tobago is one of the few countries in the world with mud volcanoes. One is near Erin Bay in the southeastern corner of Trinidad. The mud volcano isn't actually shaped like a volcano cone, but rather just a mud pond with bubbling mud. There are no signs or anything indicating that this is a natural wonder. You just drive there, park the car next to a farmers field, and walk 50 m through the woods to the mud volcano. You can walk on the dry mud, but the wet sections seem bottomless, so be careful.