The world's largest piece of copyrighted artwork.

This impressive Boston holy house is the American mecca for Christian scientists.

A former waterfront market is now in the center of town due to some interesting Boston engineering.

The site of Paul Revere's historic two lantern warning.

Berthed at the Charlestown Navy Yard in Boston, "Old Ironsides" is the oldest commissioned warship still afloat.

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

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

Where beautiful signs live on forever.

The grave of the iconic Kentucky Fried Chicken mascot features a bust of the man behind the goatee.

A pedestrian island in the middle of world-famous Times Square emits a strange (and purposeful) humming noise.

Named the fifth most beautiful building in America in 1885, this former courthouse boasts the best view in the Village.

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

The world’s oldest and biggest bookstore stocking only mystery, crime fiction, espionage, and thrillers.

A masterpiece of LGBT art has been restored in what may now be the most valuable restroom in America.

This Slovakian statue of an emerging sewer worker might just be a bronze peeping tom.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

These secluded and abandoned anti-aircraft defenses have become one the most scenic viewpoints in Barcelona.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.

A stately palace has been converted into the world's largest cannabis museum.

Macabre astrological automaton clock dating to the late 1400s.

This iconic L.A. bookshop is housed in an abandoned bank—both symbolic and chic.