Buried five stories underground, this Soviet bunker is packed with gas masks and Cold War paraphernalia.

Walk through Czech history in Prague's largest graveyard.

The hidden lair of an alchemist rediscovered in a 2002 flood.

The history of occult science is turned into a creepshow at this lurid Prague tourist attraction.

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

A small concrete monument remembers a German cold case involving incest, farm tools, and psychics.

A mysterious monument meant to be a guide into "an Age of Reason" was destroyed after an apparent bombing.

One part local history, 99 parts gruesome haunted house.

Each year melting snow turns these Austrian hiking trails into scuba zones.

The world's largest collection of intentionally useless inventions.

Austria's very first and only nuclear power station was completed but never used.

Collection dedicated to funeral rites, equipment, and mourning rituals of the Viennese.

This Austrian museum celebrates the work of famous forgers and their inimitable imitations.

Located right outside of Vienna, visitors can take in expansive views of an ethereal forest.

A neo-Gothic mansion now houses a wunderkammer of analog tech that hits on all the senses.

Macabre museum devoted to historical Viennese murders.

A small museum filled with over 1,000 clocks, and one particular clock calibrated to run until the year 9999.

The townhouse where the "Blood Countess" Elizabeth Báthory started her murderous career.