Ancient mysterious ruts carved in the bedrock.

At more than 5,000 years old, these structures are among the oldest free-standing stone buildings in the world.

These temples are among the oldest free-standing stone buildings in the world.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

Burial grounds for more than 1,000 bodies deep under the modern town of Rabat.

This Stone Age solar temple aligns with the sun on each equinox and solstice.

This lonely metal cross may hint at the true location of a medieval showdown between Christian and Pagan kingdoms.

This lovely little burbling creek is actually a deadly waterway that has dragged down everyone who ever set foot in it.

This towering wooden Sasquatch was carved with a chainsaw.

This Yellowstone geyser may not shoot as high as the nearby Old Faithful, but it erupts for considerably longer.

A beautiful geyser under environmental threat.

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

Home to the deepest rift anywhere on Earth.

The largest wildlife crossing in Utah allows local fauna to safely traverse the six-lane Interstate 80 at Parleys Canyon.

A tunnel with windows, so you don't miss out on the impressive views.

The fifth-longest natural arch in the world, and the longest outside China.

A house carved into a rock in the 1940s.

This unique art installation used boiler tubes from a decommissioned power plant to resemble Antelope Canyon.

Hidden inside this Arizona fast food franchise is an in-depth exhibit on the famed WWII counterintelligence program.

This public square capitalized on a single Eagles reference to bring some life back to an Arizona town.

This Route 66 classic sports a giant fiberglass rabbit that you can ride.

This popular pitstop lives up to its name.

Twenty-seven massive radio antennas on the high plains of New Mexico search for life on other planets.

Legends surround this jagged rock formation in the New Mexico desert.