Underneath one of the region's most historic roads lies the home of Plato's successor.

Home to the largest urban bat colony in North America, estimated at 1.5 million bats.

Turning night into day in Victorian-era Austin to thwart a serial killer.

Just like the real 36th president of the United States, animatronic LBJ amuses visitors with jokes and stories.

The Denver airport is guarded by a 32-foot-tall sculpture of a demonic horse.

These falls, sometimes called the "Niagara of the West," still put on a good show at the right time of year.

This underground cave located in the most barren reaches of Idaho is filled with ice year-round.

Home to the deepest rift anywhere on Earth.

The only bridge in the United States where BASE jumping is legal without a permit year-round.

The largest outdoor art gallery in the Northwest United States.

This pop-culture shop also offers the chance to become part of their favorite tv show or movie.

This work of art by Matthew Mazzotta resides in this park dedicated to the first black legislator in Idaho.

Secret North Korean passage discovered below the world's most dangerous border.

A stark reminder of the huge nuclear weapons plant that once stood on the site and its effect on the surrounding area.

The final resting place of American icon Buffalo Bill, and a museum that aids in telling his tale.

A downtown park built on top of unclaimed graves.

Overlooking the Colorado Convention Center is this giant sculpture made from thousands of triangles.

A focal point of in Denver’s skyline for over a century, inspired by a Venetian basilica.

Neal Cassady may still have an open tab at one of Denver's oldest watering holes.

One man's love for East Coast diner culture brought an entire eatery all the way from New Jersey to Colorado.

A half-size replica of the World Trade Center towers above Tulsa.

An acoustic anomaly with a mysterious cause.

This sculpture honors the man who was known as the "Righteous Among the Nations."

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.