One of Antoni Gaudí's most classic buildings is well-known for its "dragon-back" design.

This futuristic airport terminal was abandoned for decades before reopening as a hotel—with a vintage plane of its own parked out back.

Soaring over the Niagara Whirlpool since 1916.

A miniature representation of Canadian cities and landmarks in incredible—and sometimes hilarious—detail.

A collection of more than 12,000 shoes, displayed in a building shaped like a shoebox.

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

The giant birds honor two native North American species.

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

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

A tribute to Ponce de Leon's supposed quest for eternal youth.

The walls of America's oldest masonry fort famously "swallowed" cannonballs.

Arrr! The most authentic collection of pirate artifacts in the world... matey.

A lion given to the prime minister somehow got stuffed and sent to Florida.

Possibly the world's oldest rug, this Egyptian relic is woven entirely from ancient cat hair and once carried a mummified human foot.

A luxurious 1880s hotel with its fair share of Tiffany stained glass, Edison electricity, and of course, ghosts.

The only rotating bar in New Orleans has been slowly spinning since 1949.

A snapshot of the city's fascinating voodoo culture.

The second oldest continuously operating bar in Louisiana.

A museum and shop on Bourbon Street located in the French Quarter.

A collection of oddities including Dr. Kevorkian's suicide device, the Thanatron.

Ride the subways of yesteryear.

The last remaining relic of San Francisco's glittering 1915 Panama Pacific Exposition.

A huge musical instrument played by the ocean.

This concrete tangle of square pipes has stood as a proud thorn in the city's side since the '70s.