On the edge of this small Washington Park, a piece of the Earth's mantle has come to the surface.

Nuclear reactor created the plutonium used on Nagasaki.

An abandoned 19th-century hospital now swirling in ghost stories.

A classic gold rush hotel can be expected to pick up some ghosts along the way, and the Golden North is no exception.

The ghostly remains of what was once the world's richest copper mine.

Formerly secret, precariously perched boulders.

This perfectly preserved Chinese medicine shop was untouched for decades before being reopened as a museum.

A chance to sleep among the firs and pines of the Oregon forest.

A tourist attraction founded around a slumping cabin.

A volcanic fissure over two miles long and up to 70 feet deep.

This Cold War missile launch site has been abandoned for 40 years.

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

Mine your own precious stones.

A Nevada mining boomtown that ran out of silver and luck.

The eerie ruins of an isolated abandoned town nicknamed "the Widowmaker" for its deadly gold mine.

This former open-pit manganese mine is now a massive graffiti canvas.

This small town was built around a marble quarry and named after one of the most famous sources of marble in the world.

An abandoned mine serves as a stark memorial of when mercury was a valued strategic metal.

This silver-mining camp has been active intermittently from the 1860s to the present.

A difficult trail leads to interesting ruins in a remote canyon in the Toiyabe Range.

The only United States mine for magnesium carbonate has been operating continuously since the 1930s.

A well-preserved set of ruins not far from Lovelock.

Only a few remaining items alert intrepid explorers that a town once stood in this region.

This hauntingly stark structure is a relic of an industrial past.