This massive home was constructed by one of the greatest conservationists in Colorado history.

This former lieutenant governor's home is brimming with curiosities.

Formerly the world's largest, this Willy Wonka-esque contraption runs 24/7.

Temporary Burning Man sculpture made of two 18-wheelers.

A giant open-air sculpture made of over 200 full-sized boats.

A collection of haunted objects and macabre oddities under one roof.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

These banned cigarette vending machines now sell little pieces of pocket-sized art.

The best Tiki bar in Las Vegas.

This incredible collection of vintage pinball machines can be played at 25 cents a pop.

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

This grand stone tower was dedicated to a famed American humorist almost by coincidence.

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

Possibly the most beautiful carillon in the world, set atop Iron Mountain in Florida.

This restored farmhouse is a time capsule of a 19th-century Colorado homestead.

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

Metal water storage tank turned ethereal concert hall.

The oldest operating cemetery in Denver is the eternal home of some of the Centennial State's most famous residents.

A mental health hospital dating back more than 139 years, now features a museum.

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

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

A collection of fading fantasy tchotchkes lines this dirt road in the Colorado wilderness.

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

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