Boise State's stadium was the first non-green football field in the world.

A stoic rock cairn is all that remains to remember one of the more brutal instances of frontier treachery in American history.

This set of three large, volcanic hot springs is a favorite haunt for intrepid divers.

This ancient cave is home to a museum, bar, and is filled with fluorescent minerals.

The world’s largest concentrated solar plant generates as many problems as megawatts.

This town is home to the world’s largest arch constructed entirely of elk antlers.

A shady solar power system that couldn't hold up to the harsh desert conditions.

A museum in rural Utah documents the history of the Japanese Americans who were forcibly relocated there.

This creepy, abandoned cemetery is all that remains of a once booming mining town.

A towering tribute to decisiveness stands on the spot where Brigham Young and his followers decided that this must be the place.

This large, castle-like structure is hidden amid the mountains on the grounds of the Utah State Hospital.

The last SR-71 ever constructed.

Race through the maze, get your name on the sign.

Rare signs of the former Soviet Union in the Caribbean, though not where you'd expect them.

This lonely gas station has stood at this location since 1917.

These headstones and a few stone foundations are all that remain of a once-booming mining town.

This granite monument at the site of an ill-conceived tourist attraction is built from the same stone as the Mormon Temple.

Dubbed the "Blade Runner dragon," this buzzing neon sign is a beloved local icon.

The remains of this early 20th century refinery loom on a mountainside like a graffiti-covered fortress.

The fifth-longest natural arch in the world, and the longest outside China.

A replica that won't float away.

The unusual patterns in this rock formation result from two distinct modes of weathering.

Though dynamited and defaced, the statue still stands outside the law courts in Georgetown, Guyana.

The largest market in Guyana, designed and built by the Edge Moor Iron Company of Delaware.