However, these plants can’t sustain growth. Despite the cave welcoming up to 250 visitors daily, the light from tourists’ headlamps is too brief and sporadic to maintain plant life.

Skylight Cave in Oregon. Skylight Cave is actually a lava tube, a hollow tube that was formed by lava flowing through a ...

R. R. Tolkien's Lord of the Rings, this is it. I finally fell upon the idea of lighting the cave from the inside. If light were coming from the back of the cave it would suggest the experience of ...