Its columns were all carved from the same white oak tree.

This massive circular sculpture may not be a portal to other worlds, but it does inspire the mind to imagine them.

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

Every year, the colorful murals of Montreal get a complete makeover.

This public art pays homage to the baseball legend and civil rights icon and his time in Montreal.

A Montreal deli that was so beloved that it was allowed to circumvent their laws of language.

A swaggering, monumental souvenir of the most extravagant party Montreal’s ever thrown.

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

This stucco building in North Africa was the first American-owned property on foreign soil.

London's creepiest cemetery was once the site of dueling magicians and mobs of stake-carrying vampire hunters.

The housing complex served as an anti-fascist fortress during the Austrian Civil War.

Thousands of slain Soviet soldiers are buried within the shadow of this enormous obelisk.

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

A former top secret nuclear fallout shelter now operates like a hotel stuck in the Cold War.

A cheeky architectural easter egg.

A peculiar clock commemorates a historic victory won by ringing the noonday bell an hour early.

This hanging crocodile is thought to be the "dragon" that once plagued a Czech city.

Beneath the city of Lourdes, France is a massive, concrete church.

These 19th-century military fortifications spanning the island of Malta now form a nice countryside hiking trail.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

These sprawling military housing quarters from the 1960s are now defunct and hidden in plain sight on Malta’s Mediterranean coast.

The bones of prehistoric animals and early signs of human habitation have been found inside Malta's "cave of darkness."

One of Malta’s most important Neolithic sites sits in a suburban area south of the country’s capital.

Malta’s largest cemetery is a Victorian-era architectural masterpiece.