Underground mysteries

Caves are natural holes underneath the surface of the earth—hollowed out rock typically formed by water. If you’ve ever been able to visit one in person, you know how amazing it feels to stand inside. If you haven’t had the chance to visit one in person, or just want to experience more caves around the world, get taken away with these breathtaking photos of these natural creations.
Melissani Cave

Melissani Cave is located on the Greek island of Kefalonia. It has two chambers within the cave, one chamber is open at the top and sunlit, while the other is dark and covered in moss, stalagmites, and algae.
Benagil Cave

Benagil Cave sits on the southern coast of Algarve, Portugal. The currents around the cave can be strong so instead of swimming, many people will travel to visit the cave using a stand-up paddleboard or by boat.