This 19th-century aqueduct provides insights into how water was supplied to Victoria on the island of Gozo before modern plumbing.

An ancient well nestled at the foot of Glastonbury Tor, shrouded in Arthurian legend and revered for its purported healing waters.

The house where John Wilkes Booth conspired with his co-conspirators.

Fake subway tiles were installed to cover a design that resembled the Confederate flag—it's unclear if the resemblance was intentional.

The walls are decorated with whimsical murals painted by the creator of the Madeline franchise.

The oldest family-run luncheonette in New York, last renovated in 1948, still serves food and drinks the old-fashioned way.

Though its celestial ceiling is impressive, the true star is the vast collection of French books.

This lavish room in a New York City mansion is a rare relic from the end of the Gilded Age.

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

The notorious headquarters of a corrupt political machine.

Amid skyscrapers and traffic exists this unique aquatic ecosystem.

This simple Manhattan salt house is artfully shaped... well, like a giant granule of salt.

This exemplar of modernist architecture is meant to captivate and inspire students of the Cooper Union.

A gift from Japan, 17th-century lantern stands among the cherry trees at D.C.'s Tidal Basin.

"May prick nor purse ne'er fail you."

The initials "GW" mark where one of Scotland's most important Protestant martyrs was burned at the stake.

On the side of a Virginia highway, a collection of monuments commemorates an 18th-century trek through the Blue Ridge Mountains.

An organ located deep within a cave, whose "pipes" are the geological features of the cave itself.

World War II air raids over Bristol dislodged this fragment of tram line that ended up embedded in a churchyard.

This rowhouse doubles as one of the most photographed spots in the nation's capital.

This quirky UFO-shaped curiosity is often mistaken for the airport’s control tower.

Grab a latte at the birthplace of modern American skateboarding.

An offbeat angle on the ocean viewed through an antiquated lens.

Sit at the "Disney table,” where Walt and his team of "imagineers" once dined on the regular.