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

Artifacts and memories from the Vietnam war, located in a place that experienced it first hand.

A nightmare for the claustrophobic lies hidden in Southeast Asia.

A site where “the ravages of the war are more striking…than any other place in contemporary Spain.”

A curious fountain that has no water and includes Satan, a crab, and 9 giraffes.

A little lighthouse in New York City, surrounded by mysterious stories of insanity-driven construction.

A former insane asylum despised by Nelly Bly and Charles Dickens is now fashionable apartments.

This mosaic dedicated to John Lennon was tended for years by a Beatles super-fan.

A semi-scholarly approach to sex.

Elevated freight railway turned wildly successful urban park.

What once sat in the world’s spotlight is today a largely disused ghost complex.

The Burnside Fountain and its questionable interpretation.

Go surfing on this urban wave, "hacked" by local surfers.

Hundreds of Buddhas in a re-discovered Indonesian temple.

The stoutest tree in the world.

Superstitious? Discover the witchy side of Mexico through its largest esoteric market.

Frida Kahlo's childhood home, now a museum of her life and works.

Not to be confused with the iconic New York City skyscraper, this Chicago building is a vibrant hub for artists.

A Bibliophile's Dream.

A speakeasy takes on Chicago's drinking culture.

Wisconsin's most celebrated export gets the royal treatment on I-94.

A place to eat for on-the-run agents and espionage enthusiasts.

Statue dedicated to the star of an old television show.

A bloody history is captured in this former prison turned museum.