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

Hidden beyond a kitschy giant beetle is this remarkably sprawling collection of preserved insects.

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

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

A futuristic hovertrain is parked unceremoniously alongside a nondescript road.

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

These decaying bridges 1,000 feet high are a reminder of the skill it took to cross the Colorado Rockies by rail.

Explore some of the most unique vehicles in history along with a cast of unsettling mannequins.

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

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

The largest dinosaur trackway in North America is tucked away among this canyon's ghosts and archaeological gems.

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

Even in death, he's still your huckleberry.

When zealous marijuana enthusiasts kept stealing the "Mile 420" highway marker, the State of Colorado got creative.

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

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

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

The largest source of fossilized insects anywhere.

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

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

Wall to wall taxidermy at Denver's oldest and most exotic steakhouse.

One of the greatest heroes of the Titanic tragedy came from humble beginnings to this beautiful home.

Silver in the hills led to the speedy creation of this boom town and a lack of it saw the town abandoned nearly as quickly.

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