Once a lonely sentinel on the edge of the Great Plains, this rebuilt trading fort offers a glimpse of life on the Santa Fe Trail.

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

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The entire length of the border is marked by a 20-foot-wide slash through the trees.

A small museum that celebrates the history and culture of the LGBTQ community in England.

This 1800s former railway tunnel is now part of a heritage walking trail.

This supermarket offers shoppers a window into the past alongside their groceries.

The longest hedge maze in the world.

You'll need cowboy boots to trek to this old-fashioned saloon nestled in a giant natural cave.

Where a brain, a beauty, a jock, a rebel, and a recluse met one Saturday and changed their lives forever.

This 140-year-old beacon off the Florida Keys marks the wreck of a Navy ship that once roamed the Caribbean hunting pirates.

A book collector's dream, this Toronto bookstore has the world's first "Biblio-Mat," a random book vending machine.

This remote camping site offers incredible stargazing opportunities.

Peek into a cave of giant, glimmering crystals.

Some believe Ponce de León's mystical spring lurks right under a public drinking fountain.

A former Tibetan monk made a name for himself selling some of the best beef momos in New York.

Flowers have mysteriously appeared on her effigy every day for the last 150 years.

This 3,800-year-old site contains markers used to study the movement of the sun and moon and create a lunar calendar.

A Neolithic celestial calendar standing in a nondescript wheat field.

The mysterious megaliths have enchanted and intrigued visitors for thousands of years.

Called the "Armenian Stonehenge," this ring of menhirs pierced with holes may be a prehistoric astronomical observatory.

A sophisticated astronomical tower built by one of the greatest Persian scholars of the Islamic Golden Age.

No telescopes, no power, no gift shop: The Observatory of Chichen Itza, one of the world's oldest observatories, takes astronomy back to basics.

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