This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

Museum preserving torture methods from the past.

America's original house of worship for Spiritualism, the religious movement based on communing with the dead.

Radical Bookstore and Community Space.

Macabre headstones carved with winged skulls, dancing skeletons, and pithy reminders of impending death.

Dim sum, served in a grand old theater.

The oldest Italian café in Boston, this spot also serves as a veritable museum of vintage coffee ephemera.

This Boston medical museum features the skull of the famous medical case of Phineas Gage.

A beautiful Victorian-era cemetery, complete with a miniature village.

Two thousand artifacts from around the world collected by one woman who loved to travel.

One of the oldest used bookstores in the U.S. has been selling antiquarian treasures since 1825.

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

Philadelphia boasts one of the best — and most often overlooked — traditional Japanese gardens in North America.

The final resting place of many of Germany's most famous communists.

Known simply as "The Hand," this famous public sculpture in Berlin was featured in a Depeche Mode music video.

Super-heavy Nazi architectural experiment.

A tour of underground Berlin takes you through WWII air raid shelters and tunnels used to smuggle people out of East Germany.

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

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

An old hill fort covered in over 100,000 crosses is a symbol of Lithuanian nationalism and beliefs.

A lovingly curated curio shop in which the taxidermy wear newspaper party hats, and peanut shells are spread across every surface.