A tiny Greek Orthodox church from the Ottoman era hides on a busy city street.

Heralded as the world's first theater, these ruins are often overlooked as they reside in the shadows of the Acropolis.

The oldest cemetery of modern-day Athens blends the modern and ancient worlds.

This statue of one of baseball’s greatest pitchers looks like something out of a sci-fi horror movie.

Outside the Department of Transportation, a collection of artifacts honors the history of how we get around.

Thousands of artifacts relating to human sexuality, including the world's largest sex bike.

The world's oldest operating jazz club has been in operation since May 1934.

This Industrial Age architectural and engineering gem helps visitors and residents alike traverse Lisbon, “The City of Seven Hills.”

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This unreal Portuguese palace looks as though it's made from a pile of different castles.

This chapel on a cliff is renowned for its healing powers and was founded on the site of a supposed divine intervention.

137 graves holding New England's earliest residents.

The headquarters of the famous Yale society.

After decades of neglect, a brutalist icon is getting new life as an eco-friendly hotel.

The remnants of a Gilded Age elegance preserved in the middle of a stark modern tower.

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

A men’s restroom became a sandwich shop.

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

A cabin completely covered in coffee mugs, where visitors are welcome to leave one of their own—if they can find an empty nail.

France's most famous cemetery, with some of its most curious tombs.

The celebrated eyesore created by starry-eyed sweethearts.

The video game-themed street art first popped up in the French city.

The narrowest street in Paris.

This life-size replica of the Statue of Liberty's flame is also a tribute to Princess Diana by default.