Birds with backpacks expedite film development for a rafting company on a remote Colorado river.

A recreation of an Old West apothecary full of curios.

Final resting place of a 19th century gold prospector and convicted cannibal.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

A crumbling hospital from the 1850s on Roosevelt Island.

Medicinal spa created with the discharge from a geothermal energy plant.

Most-visited and most-photographed slot canyon in the American Southwest.

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

Over 1.3 million confiscated wildlife products fill this macabre menagerie of illegal animal specimens.

Victorian "Fancy Craft" Hair Wreaths and Relics.

The site where a nuclear bomb was lowered over 8,000 feet underground and detonated as an experiment in natural gas extraction.

A fake mine that was made using real mining techniques which is also used as a community center.

The world's largest carnivore sanctuary is home to over 450 meat-eating rescues.

This razorback ridgeline has doubled as a scenic drive since the early 1900s.

Metal water storage tank turned ethereal concert hall.

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

Air Force Academy Chapel made of 100 identical tetrahedrons works to inspire those of all religions.

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

The moving metal works of one troubled artist can still be viewed on his front lawn... for now.

One of the largest Buddhist stupas in North America is built of concrete designed to last 1,000 years.

A little-known hot spring haven right below the highway.

The haunted reputation of these abandoned Colorado train tunnels is probably not helped by the terrifying spiked fence.

This super steep hike ascends 2,000 feet in less than a mile.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.