Natural sonic phenomenon comes with a grisly legend of murder and blood.

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

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

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

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

Roaming bison and a spectacular view at the highest point in Nebraska.

The site where a nuclear bomb was lowered over 8,000 feet underground and detonated as an experiment in natural gas extraction.

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

When ecosystems collide in the arid Southwest.

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.

Crystal clear lake with a shoreline of travertine located in a Colorado canyon.

A little-known hot spring haven right below the highway.

The wreckage of a World War II bomber is hidden high in the Colorado wilderness.

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

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.

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

Paranormal experiences in this hotel's room 217 led Stephen King to write "The Shining."

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

This naturally-sourced hot spring is now home to a clothing-optional resort.

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

This 19th century jail was mainly used to incarcerate the drunk and disorderly.

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

The clock that sets them all.