It appears as if a man is standing behind this giant airport clock, painting the hands in real time.

This staircase in a lush tropical grotto was built by enslaved laborers and renamed to honor Queen Victoria's role in ending slavery in the British Empire.

This large garden vase urn has nothing to do with the seventh U.S. President—it was designed by one landscape designer to honor another landscape designer's contributions to the National Mall.

This haunting monument honors the victims of 9/11.

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

In 1986, Keith Haring was arrested for painting this anti-drug mural on a Harlem handball court.

This vintage short line in Amish country runs passenger steam train excursions and still hauls freight.

This modest relic, with rich history as a strategic fort through multiple eras.

This American Civil War-era fort still stands near the border between Washington, D.C. and Maryland.

This gate served as a small lock-up jail in the 14th century.

The Guinness Record holder as the "tallest cinema in the world" is a building with screens in almost every one of its 12 floors

A unique art installation located on what was once considered the widest railway bridge in the world.

This emblematic representation is said to bring the students good fortune.

Glasgow's own "tipsy" temperance monument.

Glasgow's oldest pub has a proud literary tradition and possibly a ghost or two.

Vibrant paintings stretch across 600 feet of derelict railway.

Order a boozy baba au rhum at the oldest patisserie in Paris.

Offal and flawless onion soup are on the menu at this restaurant that once catered to the workers of Les Halles.

This extraordinary model train layout covers over 1,700 square feet, with multiple trains running simultaneously.

The first home and studio that belonged to the famous architect.

One of Mexico's least-visited archaeological sites is tucked away inside a theme park.

The same water that fills a luxury resort’s pools feeds these free hot springs in the rainforest.

A commemorative plaque hides a door that leads down to the New York Public Library's underground book bunker.

One of the last few places in Manhattan that employed a pneumatic systemic keeps it on display.