This popular pilgrimage site offers a hole filled with holy healing dirt.

More than 21,000 images fill this overlooked gem of a prehistoric site.

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

Wedding chapel's mysterious spiral staircase said to be miraculously constructed.

This quirky hot springs town known to locals as "T or C" was named after a radio show.

A small metropolis of Pueblo cave dwellings have been carved right into the hillside of this national monument.

A cave's rare beauty held a cavernous secret hidden underground.

The second-largest cave chamber in the world was discovered in 1898 by a 16-year-old and a friend known as "Pothead."

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

A phenomenal assembly of pueblos in New Mexico is the most complete example of ancient ruins north of the border.

Seemingly grown on some other world, these New Mexico rock formations look like a disused science fiction set.

An operating lighthouse from the 1860s.

The large fjord lake is thought to be the home of "Ogopogo," a giant sea serpent.

What happens when a sculptor has to find a way around a 100-year-old copyright.

This expansive bridge in the Canadian wilderness was originally just built for friends.

A quarter mile off the coastal tip of Maine you'll find the "Beloved Island" of Franklin Delano Roosevelt.

Twice a day, the water of the Petitcodiac River flows upstream in a surfable wave.

The 32nd president's sprawling cottage sits on an island enclave jointly managed by the U.S. and Canada.

A mysterious spot where the laws of gravity seem not to apply.

Iconic rock formations that allow for exploration during high or low tide.

These powerful, if squat, Canadian waterfalls flow in different directions depending on the time of day.

Home of the world's smallest dinosaur footprints.

An urban laboratory.

A spiritual vortex among the red rocks in Sedona.