Beasts of Bermuda currently has four maps.
Caldera, the smallest, is more for the combat gamemode. Basically it's an arena surrounded on all sides by cliffs - if you want to chill with friends or have a gladiator match this is your map. Then there's forest island, adapted from Asoka's Forest Island, which is divided in two by an ocean. If a megapack is on one island you can cross to the other at your own risk. There's also a mini island in the middle to make the journey easier. Finally, there's bloodbath, a circular island with a large saltwater lake in the middle. Traveling around the entire loop takes quite awhile.
Another old map is Tropical Atoll, which is currently not playable.
Another map for the Life-Cicle and the Sandbox mode appointed BloodBath.
And a last map who is Ancestral Plains.