A small square plaque marks a failed assassination attempt that could have changed history.

Golden cobblestones remember a time when this small alley was used to avoid having to give a Nazi salute.

Among the ostentatious rococo ornamentation of this church, an image of death cuts the life-thread.

A stairway to heaven, or to nowhere at all.

Trick water gardens from 1619 featuring a 200 piece mechanical theater powered by water.

The largest ice cave in the world is thought to be the entrance to hell according to Austrian legend.

A mythically themed self-built sculpture park.

This 19th century cyclorama acts like an analogue time machine to a different era.

The amazing wonder cabinets of a very rich Austrian archbishop.

An enigmatic modern marker left next to a historic Roman site.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

The giant skeleton sculpture is surprisingly well-traveled.

Architectural monsters are devouring this palace's every door and window.

Artist's eccentric property excessively decorated with found objects and work of his own.

The construction of a tram line unveiled hidden remnants of the old medieval city.

This massive blockhead sculpture hides an entire library.

The footprint of a frustrated devil in Munich's Cathedral.

These bronze pamphlets remember a remarkable group of Germans who fearlessly opposed the Nazis in the very center of their power.

Housed in an old church, this hunting museum holds a collection of mythical bird-rabbit creatures.

A wunderkammer of mysterious objects and stories.

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

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

Berlin's natural history museum houses the world's largest mounted dinosaur and the late beloved polar bear Knut.

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.