The ancient latrines of the Greeks, in all their public glory.

The alleged house of the Virgin Mary is tucked away in a park and nature preserve on Mt. Koressos in Turkey and is holy to both Catholics and Muslims alike.

Carvings in Turkey's Marble Road may have directed ancient Romans to a hidden brothel.

A section of the long chain that blocked enemy ships from entering Constantinople.

No one is sure if the world's fourth-largest diamond had been found in a rubbish heap or was pawned by Napoleon's mom.

Quite possibly the oldest love poem known to humankind.

A marvel of Byzantine engineering under the streets of Istanbul.

This breathtaking monastery was established by Saint Benedict himself 1,500 years ago.

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

Macabre astrological automaton clock dating to the late 1400s.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

This centuries-old gothic monster has been converted into a sprawling, glossy bookstore.

The modern birthplace of Irish freedom.

This beautiful deer park was built so King Charles I and his court could go hunting while escaping a deadly plague outbreak.

A museum, art project, and institution that demands we look at the world around us in a strange new way.

A modern day curiosity cabinet.

The magic's in the hole!

Mysterious 500-year-old tapestries depict a unicorn hunt.

This hidden oasis features a stunning view of the Hudson River and the Palisades from a castle-like museum.

This Wall Street bar was once a hub of revolutionary activity where Washington famously bid farewell to his troops.

The seawater playground of gilded-era San Francisco burned to the ground in 1966.

This tea house was a hand-built gift from Boulder's sister city in Tajikstan.

One of three remaining theatres in the United States created in the Art Deco Mayan Revival style.

One of the oldest art supply stores in the United States.