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

"I did this all while you were watching TV."

This fast-food outlet is the only space and UFO-themed McDonalds in the world.

A multi-storied adobe complex has been inhabited for more than a thousand years.

A futuristic temple of light uses prisms and rainbows to create an atmosphere of peace.

A museum dedicated to the alleged Roswell Incident.

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

If drivers cross the rumble strip on this stretch of Route 66 at just the right speed it plays "America the Beautiful."

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

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

An immersive environment that is part haunted house, part choose-your-own-adventure, and part jungle gym.

Come for the oysters, stay for the priceless art honoring inventors across history and Scotland's favorite outdoor sports.

A grave marker depicting a body snatching tableau on a 19th-century tombstone.

A beautiful Greco-Roman structure houses a well once believed to have healing powers.

This stack of stones honors a murdered 18th-century woman.

The small Scottish townhouse where the "Father of the National Parks" was born.

This Birnam-based garden honors the legacy of 19th-century children’s book author Beatrix Potter.

A labyrinthine network of chambers with a storied past hides below Edinburgh's South Bridge.

A verdant 17th-century-style garden hidden along Edinburgh’s Royal Mile.

Legend says this rock was once a chopping block for public executions.

This otherwise ordinary close on the Royal Mile constituted the end of the world for Edinburgh’s poorest residents.

A castle in the Scottish Highlands has been continuously inhabited since the 1300s.

This observatory within Europe's first dark sky park offers stunning views of the night sky.

This bronze statue was erected to honor a small Scottish town's beloved stray cat.