calas

The idea I suggest would be small beaches behind large mountains.
What would make them special would be that you can find a new type of tree: the palm tree.
With the palm tree, you could get a new type of wood. The palm wood would have a yellow color.
In these coves, you can find coral structures in the water along with tropical fish.
For archaeology, it would be a good place since you could find various treasures.
Another way to find them would be with a treasure map, where there would be a probability of finding one.