A silly medieval mural preserved on the side of a Viennese house.

An exquisite Baroque church in Vienna's old town.

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

The former private quarters and office of Dr. Sigmund Freud now hosts a museum housing the works of the founding father of psychoanalysis.

The crypt of the imposing Stephensdom holds royal intestines and thousands of skeletons.

The beautiful baroque library of the Hapsburg empire.

The final resting place for the remains of 143 Habsburg royalty.

A botanically themed auditorium blooms within the world’s last operating double-decker theater.

An old Danish political institution where members of government can grab a drink off the record.

A little-known cafe in an old copper bridge tower with 360-degree views of the harbor.

A collection of noses tucked inside an art museum reveals how times have changed.

The largest bottled beer collection in the world holds over 22,000 unique beer bottles.

Hans Christian Andersen for the postmodern world.

A fantastical 13th-century fortification sandwiched by a modern hotel in central Brussels.

When you're a great Russian Tsar, even your vomit gets a statue.

From Tintin to the Smurfs, Europe's greatest graphic icons are celebrated in a grand Art Noveau gallery.

The Devil’s own choice when he needs a drink in Brussels.

Three floors of musical instruments coming from all corners of the world and hundreds of years of musical history.

The site of one of the largest prison escapes of World War II.

This walkway is so narrow it needs its own light to stop pedestrian traffic jams.

A series of playful yellow penguins share a serious message about the environment.

The slender brass strip in Prague's Old Town Square was used to tell time from 1652 to 1918.

The oldest garden in Prague, once part of an medieval orchard.

An existential riddle in the world's largest ancient castle.