This replica of the Greek structure is in the heart of Nashville.

This sculpture by artist Fritz Keonig survived the 9/11 attacks and now stands as a monument to the victims.

Where the lovelorn find a home for their sentimental keepsakes.

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

A musical instrument played by the sea.

A monument in Washington D.C. marks the spot from which all other roads were supposed to stem.

The eccentric mansion of one the most popular horror authors of modern times.

Oldest existing church in New York and the inspiration for Washington Irving's "The Legend of Sleepy Hollow."

The subtle science of a master molecular gastronomist.

Strange red rock formations that have been attributed to a higher power for hundreds of years.

A wall of chewing gum moonlights as collective art.

Stroll through retro Paris while shopping for old postcards and discarded doll heads.

An alleyway plaque is all that remains of the independent Texas' envoy that forgot to pay their rent for over a century.

A horde of stray cats rule in this secluded Parisian cemetery under a bridge.

A celebration of capitalism in Midtown.

This little museum is built on a theater that was once a wildly elaborate speakeasy.

The popularity of Sherlock Holmes led to the creation of his fictional address, turning the orderly London street numbers askew.

The only swimming pool listed on the National Register of Historic Places is emptied and refilled each day with naturally filtered water.

This ornate Victorian marketplace was the setting for Diagon Alley and the Leaky Cauldron in the Harry Potter films.

Home to items never before seen by the public.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

The magic's in the hole!

The one-stop shop for all of your superhero (or evil arch-nemesis) needs.

Construction of Barcelona's iconic (but controversial) church is expected to be completed in 2026—a century after the death of its architect.