This whimsical castle of grottoes was the labor of love of a French postman, and one of the greatest achievements of outsider architecture.

One of the oldest medical collections in Europe focusing on rare surgical instruments.

This ancient ruined monastery has been destroyed by fire so many times that it seems like God hates it.

Striking occult iconography on a medieval German church.

This temple to the sturm and drang of Richard Wagner contains a dragon's cave and reptile zoo full of living "dragons."

Once the tallest building in the world, this abandoned church is now a monument to the destruction of WWII.

This German museum is devoted to all aspects of grave culture from headstones to coffins.

One man's personal kunstkammer, museum and shop.

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

A striking 12th-century-style castle built on the edge of a cliff.

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

This medieval castle overlooking the Elzbach river looks just like it did hundreds of years ago.

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

"The most colorful grottoes of the world.

This historic stone bridge has an entire neighborhood clinging to its sides.

A museum dedicated to the history of a terrifying secret police is now held in their former headquarters.

A small but immensely extravagant palace built by the "Night King."

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

A slice of central Asia in the middle of Berlin.

This classic restaurant features a gorgeous mirror-clad room.

The most visited, and possibly most controversial, museum in Germany.

A surreal museum of extraordinary industrial objects.

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

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