It can be used that way. If not it is just a cave.
the cave
A cave
In a cave.
A cave/den.
The cave was helpful because it could be like a shelter to Brain.
Odysseus went into the cave to find food for his crew. His crew also went into the cave for shelter.
i think dolphins sleep in a cave.:)
cave or tent
Early people found shelter either under a tree or a cave.
It was a readily available shelter before humans developed the skills of building.
they live in cave below the ocean
Find a cave