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

The official atomic museum of the United States explores the explosive and productive history of a much maligned energy source.

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

Despite time, colonization, and the brutal New Mexican heat, these Pueblo ruins still stand.

These Pre-Columbian petroglyphs contain representations of birds, deer, hunters, and even some early Native flute players.

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

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

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

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

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."

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

Catacombs turned marketplace.

One part local history, 99 parts gruesome haunted house.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.

American revolutionaries and British soldiers alike are buried here in the fourth-ever cemetery in Boston.

The first bell ever cast in Boston was cast by Paul Revere...and sounded terrible.

This nearly 200-year-old restaurant's history includes an exiled French prince, JFK, and a very hungry Daniel Webster.

Mrs. Mallard and her brood are a beloved fixture in Boston Public Garden.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

The American Revolution was galvanized into serious action due to the tragic clash with British soldiers that occurred at this location.

The Boston square dedicated to the dark poet who was born nearby.

Come face to face with the ferocious visage of the serpent-headed mother goddess of the Aztecs.

The most complete statue of this Aztec god sits a top a throne carved with images of hallucinogenic plants.