Once a meeting point for great thinkers, and the midpoint of the country.

The old observatory in Copenhagen has a spiral corridor used as a racetrack.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

Climb to the top of its spiral spire for spectacular views of Copenhagen.

Visitors are treated to a stained glass kaleidoscope interior inside this work of art.

Site of the first radio and telephone broadcasting companies in Copenhagen.

Richly carved, brightly painted doors that turned small fishing villages into open-air showcases

Hitler's bleak vision of relaxation still stands as a mostly abandoned 10,000-room resort complex.

An enigmatic concrete structure in a lakeside Toronto park raises more questions than answers.

Dedicated to the American general whose reply to a German demand for surrender was simply "Nuts!"

A whimsical bridge uses saxophones to pay tribute to two great men and the European Union.

Eat the ultimate iteration of Portugal's most beloved pastry.

One Portuguese poet described this cape, the westernmost point in mainland Europe, as "where the land ends and the sea begins."

The verdant mossy ruins of a Franciscan monastery lie in the remote Sintra hills awaiting exploration.

At night, bats patrol this magnificent 18th-century space in search of book-eating pests.

A fortress off the West coast of Portugal that dates back to 1502.

Lovers proclaim their unbreakable bond by leaving their names on locks fastened onto the Shoreditch fence in East London.

Artists and musicians now rule over this former rail station.

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

A hands-off space for graffiti artists to hone and display their skills.

Several plaster noses are hidden in plain sight around London's Soho neighborhood.

A miniature city, once ruled by the Queen of the Netherlands.

Enjoy a pint surrounded by Europe’s largest collection of vintage beer advertisements.