A subterranean house of worship carved right out of the bedrock.

South Carolina's last remaining slavery auction house is now a museum devoted to its own tragic history.

A massive Montreal stadium that has seen nothing but trouble since its inception.

A grand Gothic Revival basilica with stained glass depictions of Montreal's religious history has only one soul resting in its crypt.

Dublin's most modern, visually spectacular bridge is modeled after Ireland's national emblem.

The first Catholic church in Singapore is a Neo-Gothic colossus with a rich architectural history.

The trials and tribulations of marking Poe's grave.

The actual model from the original "Star Trek" series is now on display at the National Air and Space Museum.

There’s a hidden military meme engraved on the World War II Memorial.

Look closely and you’ll notice that the color changes a third of the way up the tower.

Romania's triumphal arch looks out over Bucharest.

World's largest bell sits on the grounds of the Kremlin in Moscow.

This building holds the embalmed remains of the leader of the Bolshevik Revolution.

Hollywood's most famous landmark, the "temporary" sign that has stood for decades longer than intended.

This enormous monument is one of the most iconic structures in Tokyo, rudely nicknamed "The Golden Turd."

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 statue was given to France by the United States to commemorate the centennial of the French Revolution.

An "inside out" building in the historical center of Paris, featuring Europe’s largest modern art museum.

A favorite Paris bar for U.S. expats, including Gershwin, Hemingway, and James Bond.

High atop the Eiffel Tower is a small apartment built exclusively to entertain the science elite and make the rest of Paris jealous.

The very center of Paris is surrounded by a bevy of strange good luck rituals.

Six ravens are kept captive (but well-fed) at the Tower of London to prevent the fall of the Crown.

Hear the quietest sound from across the dome.

Kings Cross Station pays tribute to its role in Britain's best-selling book series.