The world-record holder for the longest bridge stretching continuously over water.

Auguste Maïcon, a pioneer in French aviation, was born in this house in 1891.

A plaque marks the spot where the saint was shoved off the Charles Bridge and into the river.

The tradition of open-air secondhand and antiquarian bookselling in Paris dates back to the Renaissance.

This restaurant has been a haven for D.C.'s LGBTQ community since the 1950s.

Ninety feet off the valley floor is an ancient dwelling put under protection of the U.S. government by Teddy Roosevelt.

Giant, natural amphitheaters made of delicate geological formations called "hoodoos."

Enormous piles of historically significant stones, dumped by Congress in a forest, and abandoned for 60 years.

The first American department store, and home to the largest operating musical instrument in the world.

A museum and shop on Bourbon Street located in the former home of the second Voodoo Queen of New Orleans.

An historic and oft-filmed spot for musclebound iron pumpers on the Pacific coast.

This star-studded Old Hollywood restaurant is where fettuccine Alfredo made its United States debut.

A popular shrine where the Blessed Virgin allegedly appeared in 1830, displaying a holy armchair and two incorruptible remains of Lady Saints.

The vast, legendary catacombs hold secrets much stranger than stacked bones.

Increasingly decayed figures stand as a powerful reminder of the human costs of Czech Communism.

Around 100,000 bodies are buried below the medieval headstones, many of which mark graves with multiple bodies stacked up to 12 deep.

Steepest flood safety railway in the entire world.

This dramatic rail curve was once the target of a failed Nazi attack.

A former major munitions plant that has been converted into a sprawling art space.

This isn't your average roadway—it's actually a National Park and a transportation pioneer.

The romance of early commercial flight still fills this Art Deco destination.

A super-sized promotional trick that is now a D.C. landmark.

One critic described it as "middle Mussolini, early Ramses, and late Neiman-Marcus." Another called it an architectural "natural disaster."

The site of the climactic scene from the classic horror film is now a historic landmark.