Legend says train robbers stashed their gold within the depths of this unusual cave.

This small museum is an eccentric shrine to boyhood in the 1960s.

No one's quite sure why there's a metal megaphone bolted on two rocks in the middle of the Mojave Desert.

The largest copper mine in Arizona, this enormous open pit emerges from the hills like an alien landscape.

The hellish conditions of this abandoned mine that snakes beneath the Pacific Ocean gave it its diabolic name.

The site of the climactic scene from the classic horror film is now a historic landmark.

A tribute to the incredible generosity the Choctaw Nation showed the Irish people during the Great Famine.

At high tide this strange footbridge appears to have no purpose whatsoever.

A new kind of theme park for adults off the Las Vegas Strip.

The only diamond mine in the world where you can keep what you find.

More than 5,000 artifacts donated by the people of the city, plus a room entirely devoted to the band U2.

Rich red almandine gemstones are waiting inside the volcanic rock strewn across this eastern Nevada hillside.

Rent out a glass igloo to watch the Northern Lights like you live in the future.

Mine your own precious stones.

The abandoned "Red Star Train Graveyard" is the final rusting place for precious artifacts of train history.

Home to the deepest rift anywhere on Earth.

Once the product of an inexplicable gold strike, this ghost town is now home to one man and his love of classic machines.

Don't blink or you'll miss it.

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

Despite its name, this route in southern Utah offers a heavenly day trip.

The rusting remains of the largest assembled WWII fleet on the West Coast.

Once a bustling fishing port, this semi-ghost town is now more than 90 miles away from the shore.