France's most famous cemetery, with some of its most curious tombs.

The macabre collection of Jacques Sirgent, an expert scholar on the undead and all of their trappings.

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

Solar observatory doubles as a daring display of Expressionist architecture, much to Einstein's chagrin.

This platform is now a memorial dedicated to those who were deported during the Holocaust.

Started as a kitchen garden, now the second largest botanical garden in the world.

One of the oldest cemeteries in Germany was originally used for victims of a cholera epidemic.

Gardens representing parts of Asia, Europe, and the Mid East are tucked away among the Soviet-style buildings in East Berlin.

Dedicated to the European Sinti and Roma peoples murdered during the Holocaust.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

Reminders of the Battle of Berlin still scar the railway.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

Four-story concrete hotel never opened to customers.

11,500 year old little girl found buried in an ancient fire pit.

Mind-blowing carvings and fantasy ice scenes grace the largest year-round ice environment in the world.

Research missiles and rainbow auroras at the world's largest land-based rocket range.

One woman's dream became a train hotel in her backyard.

North America's first frozen mummified remains of an ice age steppe bison, the 36,000 year-old mummy named "Blue Babe."

A sarcastic monument threatens to curse any "idiot" who dares remove it.

A morbid gateway to an Alaska town prides itself on the hunting history it represents.

A hidden three-foot-wide house separates these two regal churches.

Ring the bell to enter a bar that looks equal parts museum and old curiosity shop.

This grove of ghostly cedars was killed in 1700 by an enormous tsunami, felt from the United States to Japan.

This tiny lake temple dedicated to a water goddess seems to float on the surface.