An ancient theatre in the "little Rome of the Alps."

Beautifully decorated tarot cards from the Middle Ages.

An artificial lake that opened in 1930 as a seaplane airport, now a park for aquatic activities.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

The train platform where Jews were sent to concentration camps is now preserved as a Holocaust memorial.

A space dedicated to contemporary art and culture, co-chaired by fashion icon Miuccia Prada.

Just across from the "Last Supper" painting is the famous painter's vineyard, a gift received for creating the masterpiece.

The mark of the Devil's horns on a marble column in Milan.

This giant middle finger statue sends an unambiguous message to Italy's bankers.

The secret medieval communication system will whisk your words above the noise of the crowd.

Third time's a charm, or in this case, two testicles are.

Known as "Toronto's Flatiron."

This whimsical fountain pays tribute to Toronto's four-legged friends.

The giant birds honor two native North American species.

This half-ton piece of the Alps sits at the base of the CN Tower.

One of the Seven Wonders of the Modern World holds the world's tallest metal staircase.

A free James Turrell artwork all to yourself

This giant roadside fruit is home to an array of apple-based treats.

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

Despite the name, the waters of this Canadian lake are actually blue-green in color.

The mastermind behind this palatial hotel perished on the Titanic weeks before its grand opening.

Louise Bourgeois' 30-foot-tall steel spider sculpture.

Europe's second largest ossuary wasn't discovered until 2001.

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