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

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

A fragment of one of history’s most famous walls stands as a reminder of unity in a culturally divided city.

Go surfing on this urban wave, "hacked" by local surfers.

Daily jousts and dancing barrel makers in Munich's mechanical clock.

A fearsome dragon clings to a corner of Munich's city hall.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

Liechtenstein's royal family calls this medieval alpine castle home.

See the rare bloom of the "Queen of the Night" cactus at one of the world's largest succulent collections.

A brutalist gem towering over the heart of Milan.

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

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

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

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Saint Borromeo often prayed in this austere crypt during the 16th century.

"The prettiest love letters in the world" ... or so said Lord Byron.

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

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

This historic covered bridge contains a series of macabre paintings that communicate one thing: everyone dies.

This memorial commemorating fallen Swiss Guards of the French Revolution has been called the saddest stone in the world.

Switzerland's oldest public observatory is an important part of the Zurich cityscape.

Underneath the well-known Lindenhof hides a secret cellar documenting Zurich's early history.

Ornate lobby of a police station is decorated with colorful murals by Augusto Giacometti.

A 700-year-old drinking fountain turned charity for the less fortunate of Zurich.