Monasteries on rock pillars, once accessible only by frayed ropes.

A tree-like building perches on its trunk in the Steglitz neighborhood of Berlin.

A restaurant and observation deck built in a unique broadcasting antenna.

Terrifying derelict military hospital once housed a recuperating Hitler.

This unique Renaissance castle was turned into a home for Nazi occultism.

Between Neo-Pagans and Neo-Nazis, these strange rock formations have a curious cult following and a very strange history.

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

A sweet museum focused on beets.

This TV tower once secretly housed a GDR intelligence team.

Art and a pun, all in one.

Explore the complex ecology of this multifaceted nature preserve by riverboat.

This classic restaurant features a gorgeous mirror-clad room.

Antique frame collection with 2,400 frames.

An abandoned NSA listening post on Berlin's "Devil's Mountain."

The natural mummy of the less than chivalrous Knight Kahlbutz.

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

Underneath this small church are 15,000 bones, arranged by an obsessive academic.

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

The prototype for all Nazi concentration camps.

The world's tallest church tower reveals a spectacular view to anyone up to the task of climbing the daunting staircase.

A castle from the Holy Roman Empire that hosts traveling youth... in its stables.

"The most colorful grottoes of the world.

A monument to the "father of modern warfare" Gustav II Adolf.

The resting place of 18th century German mummies.