Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

This fairytale castle was built as a show of power but was nearly torn down thanks to its history of torture.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

A preserved college lock-up that recalls a clubhouse approach to discipline.

A memorial for a young woman and her ghost, which are claimed to have caused countless deathly shipwrecks.

The birthplace of Karl Marx is now a museum dedicated to the communist revolutionary's life and work.

Originally envisioned by King Ludwig II to rival Versailles, Herrenchiemsee's "New Palace" remains half-gilded for lack of funds.

Thousands of tourists and residents in Cologne affix "love padlocks" on the Hohenzollernbrücke Bridge to symbolize their affections.

The "Prussian Versailles" that is as glorious today as when it was built.

The fairy tale castle of the "fairy-tale king."

This region of Slovakia boasts some of the most plentiful opal mines in the world.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

At Monet's beloved home you can still see the Japanese bridge, waterlilies, and weeping willows that were the subjects of some of his most iconic paintings.

Tables of secondhand books fill the inner courtyard of this 17th-century stock exchange.

Museum in a swimming pool where the water still flows.

A wooden theatre that remains the heart of a charming Victorian-era New Jersey enclave.

Memorial to the 137 lives lost on a ship fire, the whole hulk of which washed up on the Asbury Park shore.

Infamous marsh filled with toxic waste, World War II-era London rubble, and dead mobsters galore.

This unassuming retro burger joint was billed as “diner of the future” at the 1939 World's Fair.

These unassuming lighthouses have seen the first reading of the Pledge of Allegiance, the first wireless transmission, and more than one mystery.

Vacant Beaux-Arts buildings that serve as reminders of a beach town’s glory days.

Marie told fortunes from her small stand on the Boardwalk for decades, including to a young Bruce Springsteen who would busk outside her booth.

Rusting away on the edge of New Jersey are the remains of a Cold War missile launch site.

A reservoir of vintage pinball machines and arcade games for the nostalgic and thrill seeking.