The ruins of a world-renowned medieval hospital.

A highly-criticized monument in Budapest has become the site of a makeshift Holocaust memorial.

An opportunity to walk in the footsteps of Noble Peace Prize winners.

A secluded oasis of contemporary art and natural beauty.

Hundreds of these oversized benches have been built as an art project meant to change people's perspectives.

Perhaps the world's cheapest vending machines.

Grand architectural relics gain a new life in this Pennsylvania warehouse.

A journey through every aspect of the human body.

A series of stained glass artworks that depict images of the hit TV show.

Sip colonial-era cocktails at this monthly recreation of a 1740 watering hole.

In the heart of Tirana, this underground nuclear bunker has been transformed into a museum.

The only Leonardo Da Vinci painting in the Western Hemisphere.

A folk-art cottage and hotel straight from a Slavic fairy tale.

Tacoma's historic Beaux-Arts train station is now a federal courthouse featuring large-scale glass sculptures by artist Dale Chihuly.

Marvel at this immense work of art that greets arrivals to the city.

These concrete crustaceans are actually public restrooms.

The world's first fully-fenced urban ecosanctuary is a haven for New Zealand's rare and endangered species.

One of the three perfect vellum copies of this historic book known to exist is on display in a specially-designed case.

The rodent-shaped sidewalk imprint that earned worldwide media attention.

Founded by French colonists in 1919, this mountain resort has been transformed into one-of-a-kind theme park.

The National Park Service’s best-kept secret with views that rival any in D.C.

Senators used to relax in the nearly forgotten marble tubs now hidden in the U.S. Capitol Building's basement.

A rotating cast of guys and dolls in front of a Washington, D.C. building.

With over 100 jam-packed rooms to explore plus elaborate tea services and events, the Mansion on O Street is a hidden treasure.