The eerie remnants of an ancient forest were hidden under the sand for centuries.

The venerated body of a 12th century saint is celebrated each year with the 'Race of the Candles.'

This medieval mountain town is also known as the "Village of Streams."

The giant skeleton sculpture is surprisingly well-traveled.

What appears to be an ancient Roman temple is actually a Catholic church.

A former reservoir that was only recently discovered after more than 60 years of disuse.

Two churches shoot bottle rockets at each others' bell towers in an unusual Easter celebration.

This medieval "painted village" is famous for its geometric facades.

This massive swimming pool is the high tech home to the human-powered submarine races.

A huge musical instrument played by the ocean.

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

Known as the most scenic route in Sri Lanka, this train line is steeped in history and offers an unparalleled view of the country.

Private collection of art inspired by cabinets of curiosity.

These old stone ruins in the Oregon wilderness were once bathrooms and are steeped in legends of murder.

Once a year, at exactly 11:11 a.m., this monument comes to life.

The eroded core of an ancient volcano is now accessible by a short hike.

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

Founded by members of the Tohono O’odham Nation, this one-room joint's James Beard–winning fry bread is light as a cloud.

The massive, incredibly rare instrument is over 11 feet tall with a range so deep it goes lower than humans can hear.

This 40-room dwelling tucked within a cliff was built by the basin's prehistoric residents.

This golf ball–shaped former desert real estate office now houses a UFO museum.

Thousands of Mexican Free-Tailed Bats soar around an abandoned storm drain at sunset each summer.

The largest natural travertine bridge in the world is nestled in a small canyon in central Arizona.

This Arizona observatory is famous for investigations into Martian life, and as the place humans first spotted Pluto.