A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

The Stonehenge of Wales is one of the grandest neolithic dolmens still in existence.

A house built from trash known as the poor man's Hearst Castle.

Cambria's most unique B&B features creative surroundings and fantastic food.

Factory that once supported an entire company town of 350.

Machinery left over from California's once thriving mercury industry now attracts artists and explorers.

Ancient human, animal, and geometric figures drawn in the earth.

An expansive and intricately restored mansion remains from over a century ago--and so do its ghosts.

An underground mansion with fruit-bearing trees and grapes growing beneath the surface of central California.

Under the right circumstances, this waterfall in Yosemite briefly turns a luminescent fiery orange.

These millipedes glow not out of attraction, but as a not-too-subtle warning.

Hidden beneath a lake for decades, this brutalist mine has now emerged from beneath the receding waters.

This naturally heated mountainous creek has created a group of neon blue pools of potentially deadly boiling water.

An absolutely beautiful 200-foot stained glass installation traces the evolution of knowledge.

This once bustling boomtown hotel is now the hottest spot in Nevada for ghost hunters.

Graffiti, cars, and religion combine to create this jungle of scrap in the Nevada desert.

Eulogizing an unknown man's unusual demise.

Formerly frequented by Hollywood stars and now open for tours.

A mining town once rife with murderous disputes over its copious treasures now creates income as a popular spot for photo shoots.

This famous Nevada gold mine, once a hotbed of Wild West shenanigans, is now open for tours.

A crumbling wizard is one of the final reminders of a roadside Middle Earth.

This central Nevada cave is the spiritual home of ancient and enigmatic pictographs.