This open air cathedral invites all faiths to worship under the only roof big enough to fit them all: the sky.

A lesser-known part of the Kinsey Institute is this impressive collection of art, artifacts, and material culture related to human sexuality.

Lions and tigers and leopards, servals, pumas, bobcats, lynxes, and ocelots... oh my!

Each year, teams of the world's best snow sculptors have 65 hours to create frozen masterpieces.

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

The huge collection of paintings of the American West is one of Denver's best-kept secrets.

A collection of over 15,000 zines works to preserve DIY publishing culture.

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

Inspired by a music box, a small town Vietnam vet carved an entire carousel full of animals by hand.

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

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

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

See six states, pickled freaks, rocks, and antiques.

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

A technicolor place of worship for Elevationists.

This "zoo" is a cross between a junkyard and a sculpture garden, featuring animals you won't see anywhere else.

A breathtaking array of ancient Pueblo structures and artifacts counterintuitively preserved by neglect.

The largest self-built castle in the U.S., six decades in the making.

Wondrous sandstone hoodoos where Native Americans collected clay for pottery, 9,000 years ago.

A deserted island in southwest Japan that once sheltered persecuted Christians.

Once adorning a New York skyscraper, these reclaimed ruins now haunt an Indiana park.

Symbolic attempt to overcome the issues of life.

Locals purchased this abandoned quarry in order to make sure it continues to be overgrown.

This extravagant villa built by a Burmese merchant is part pagoda and part European mansion.