Germany's Glienicke Bridge has a shady history of clandestine meetings, espionage, and spycraft.

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

Ruins of a German Castle on top of a towering stone pillar.

The bunker where Hitler took his own life is hidden under this deliberately ordinary parking lot.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The bust of Romania’s most notorious ruler, Vlad Dracula aka "Vlad the Impaler," keeps watch over the ruins of his medieval court.

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

The possible imprisonment of Vlad the Impaler here earned the medieval castle its nickname, "Dracula's Castle."

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

Once the tallest building in the world and the site of "the highest dinner ever held in New York" this building now holds the most expensive penthouse in the city.

An astounding collection of medical specimens, including bits of President Lincoln.

The world's oldest hologram gallery and the labyrinthine laser laboratory of a holography pioneer.

The quaint little store that is said to have inspired a famous Dickens novel was only given its name after the book was released.

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

Mysterious 500-year-old tapestries depict a unicorn hunt.

A sacred site for Native Americans surveyed by George Washington and owned by both King George III and Thomas Jefferson.

One of only two commuter aerial tramways in the United States.

This cemetery has graves dating back to the 17th century, including the city's oldest carved tombstone and an ominous cryptogram.

Explore the largest pure gypsum deposit in the world, and go dune sledding while you're at it.

The world's longest known cave system.

A dilapidated dock tells the story of Titanic's missed arrival.

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

Whisper secrets in a busy station only to be heard on the other side of this acoustic arch.

Read a book next to a Midtown waterfall.