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

One of the largest underground systems runs under Canada's largest urban center.

A 98-room castle in the middle of Toronto that bankrupted a 19th century electricity multimillionaire.

In the past, Renaissance sex workers were encouraged to entice customers on this bridge.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

This community on a small Venetian island has taken to painting their houses in bright neon hues.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

Its frescoes depict the likeness of Marshal Tito, Karl Marx, and Friedrich Engels burning in hell.

A tiny church on a man-made island in the Adriatic.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

What happens when you cross a mayor and a painter?

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

A beautiful and moving memorial set on a little island in the middle of the river in Minsk.

The apartment building where JFK's assassin lived after defecting to the Soviet Union.

Remnants of the city's Soviet history hover over this modern fast-food outlet.

Glowing orb in Minsk houses 8,600,000 items.

Gargantuan home of Russian science.

Stalinist skyscraper built with help of cryotechnology.

The tallest hotel in Europe.

Former headquarters of the KGB.

The oldest museum in Russia is home to a fascinating collection of nearly two million anthropological artifacts and anatomical curiosities.

The gorgeous entrances into the city's underbelly look more like grand halls than subway stops.