An abandoned 1970s theme park that has been turned into a space for waterfront walking.

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

Smallest house in Toronto sits on a lot meant to be just wide enough for cars to drive through.

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

A mysterious lake provides fresh water without any source, somehow restoring itself from atop its mountaintop perch.

City law dictates that this mountaintop cathedral containing the heart of a saint is to remain the tallest building in town.

Extremely long cable tunnel buried under the river.

This lovely, if imposing, piece of Canadian gothic is possibly the most photographed hotel in the world.

The floating gallery illuminates the heart of Québec City's arts district.

The first tourist attraction to offer tours for interstellar tourists.

A beer pipeline runs beneath Bruges.

A 14th-century fortified keep showcases the masterpieces of an ingenious 20th-century clockmaker.

This pair of running lions engraved on animal bone is one of the earliest artistic depictions of big cats.

Former hunting lodge of a duke who was an avid collector of impressionist works.

This statue was given to France by the United States to commemorate the centennial of the French Revolution.

This crumbling, graffiti-covered mansion sits tantalizingly within reach of the proletariat who frequent a public park.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

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

This Italian ski resort rose to fame when Benito Mussolini was held prisoner there and then rescued by the SS.

Macabre museum devoted to historical Viennese murders.

Op-art architecture designed for happiness.

Built in 1870 at the bridge that connected Buda and Pest, this spectacular incline railway was almost lost forever during World War II.

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

This easily overlooked memorial immortalizes the scars from the 1956 Hungarian Revolution.