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

The installation’s official name, “You Who Are Getting Obliterated in the Dancing Swarm of Fireflies,” says it all.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

The legendary building that needed ghostly approval before being built.

An abandoned cemetery lies in ruins as the surrounding forest swallows it whole.

An emerald-green grotto just a short trip from Austin.

The neon signs from Las Vegas' past find their final resting place at this unusual graveyard.

A peculiar mansion built by the troubled heir to the Winchester Rifle Company fortune.

A psychedelic labyrinth on the San Francisco bay.

This century-old painting of a portly 10-foot-tall man spent years hidden behind plaster.

Half a century after it was abandoned, this ghost town is coming back to life.

The site of a defunct mill, that once supplied marble for the construction of the Lincoln Memorial.

Toss a Frisbee through the ruins of this Colorado gold mining town.

Metal water storage tank turned ethereal concert hall.

The remains of the dam that unleashed a 15-foot wall of water on Denver.

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

Once an unstoppable source of gold and silver, this town came to a grinding stop when the groundwater proved deadly.

An architect in Aspen used psychedelics as his muse while building this mushroom masterpiece.

Where scientists keep miles of very valuable ice from Antarctica and Greenland from melting.

This spectacular track has run continuously since 1882.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

At this Denver landmark, the meals are compulsory, the sopapillas are complimentary, and the insanity is everywhere.

This naturally-sourced hot spring is now home to a clothing-optional resort.

A technicolor place of worship for Elevationists.