In all of the 29 years it was in operation, no prisoners ever escaped successfully... or so they claim.

Designed by Buckminster Fuller, this relic of the 67 Expo survived fire and ice.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

The water-powered carriages are long gone, but for over a century this funicular railway has been the fastest route to the highest point in Paris.

This is the real-life “Phantom of the Opera” box from Gaston Leroux's 1910 novel.

Gustave Eiffel's masterpiece until the Eiffel Tower was built.

In 2010, Nicolas Cage purchased two plots in this cemetery using one to construct this strange pyramid mausoleum.

This Alaskan town appoints the general store's resident feline as honorary mayor.

A little sculpture with a large wardrobe.

Perhaps the most scandalous statue of America's first president.

Two large-scale sculptures of Adam and Eve greet visitors in the nude at the Time Warner Center in NYC.

The final resting place for the remains of 143 Habsburg royalty.

See some of the world's greatest racing horses at this idyllic thoroughbred breeding facility and garden complex.

This London pub hides a peculiar secret: a recreation of the rooms shared at 221b Baker Street by Sherlock Holmes and Dr. Watson.

The gorgeous library at Trinity College is home to remarkable treasures of Irish identity.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

The world's largest mountain carving could fit all of Mount Rushmore inside it many times over.

One of the oldest living oak trees in the Southeast.

An enormous, inside-out glass globe built in 1935.

A snapshot of the city's fascinating voodoo culture.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The only structure left with direct ties to the Salem witchcraft trials of 1692.

Home to items never before seen by the public.