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

This three-mile concrete levee in Pueblo, Colorado was transformed into the world’s longest painting.

Unlike most arches, this geological oddity formed in a volcanic dike.

One of few remaining antique carousels with stationary animals in the U.S.

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

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

Small teepee-like houses built for TB patients have become sheds, studios, and bus stops around Colorado Springs.

Travel through the wholesome amusements of yesteryear at this charming miniature village.

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

The world's largest key collection features keys to the White House, Frankenstein's castle, and Hitler's bunker.

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

A downtown park built on top of unclaimed graves.

Even in death, he's still your huckleberry.

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."

This spectacular track has run continuously since 1882.

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

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

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

Hidden beneath a bridge, this waterfall is known for the large amounts of graffiti painted on its base.

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

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

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

This modern antique shop is a museum for 1980's Saturday morning cartoon culture.