A seven-story 1920s mausoleum outside Denver houses thousands of remains.

Isak Heartstone, a 15-foot wooden troll made out of recycled materials.

Possibly the world's only drive-in movie theater with an attached motel.

A recreation of an Old West apothecary full of curios.

In the middle of a suburban Denver neighborhood is a cave that once provided solace for a prominent Ute chief and his family.

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

This interpretive path lets you get up close and personal with dinosaur bones.

The scene of one of the darkest moments in American labor history has been left essentially untouched since the tragedy.

A coal fire has been burning underground here since 1896.

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

Climb to the top of this spiritual tower, and you'll be rewarded with spectacular views.

This iconic science fiction house still looks like something from the future.

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

Community owned and operated, this property is home to a diverse set of nudists.

This deserted Gold Rush town is home to a Masonic lodge that, strangely enough, still holds meetings.

A small horde of mythical creatures lurk almost imperceptibly within the museum's wildlife dioramas.

The childhood home of Henry Jones Jr. is now an adventure-themed bed and breakfast.

Gleaming self-built castle towers made from beer cans and inspired by "Vitamin Mary Jane."

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

One woman's UFO-themed campground, complete with self-built energy vortexes, UFO-themed weddings, and magic bushes.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

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

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

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