This museum promotes informed contraception by documenting its often secret past.

Op-art architecture designed for happiness.

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

Legends surround an ancient tree trunk riddled with nails for good luck.

This grand manse has been transformed into a museum devoted to one of the founders of Fantastic Realism.

Along the edge of this fountain are 365 smaller fountains that represent the days of the year.

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

Vienna's giant wonder wheel had a starring role in one of the greatest noir movies of all time.

Dine amidst exotic plants at this former royal greenhouse.

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

Designed as a reminder of one of the darkest moments in Austrian history.

Vienna's diversity-themed traffic lights were inspired by the Eurovision Song Contest.

In the middle of a Vienna square, Roman ruins dating back some 2,000 years are on display.

Baroque celebration of the end of the Great Plague of Vienna.

This curious sculpture represents the perseverance needed to take to the skies.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

A taxidermied stork with an arrow through its neck proved that birds migrate.

This building's name and a plaque are all that's left of what was probably the most important nightclub of the Madchester music scene.

A wonderfully versatile natural history curio cabinet preserved since the 1840s.

An incredibly well-preserved barbershop from the 1920s was transformed into a tiny local museum.

This natural history museum houses one of the world's largest rat kings, a terrifying jumble of tangled rodents.

This historic little railroad runs through some of the most beautiful scenery in Germany.

This small exhibition displays equipment and artifacts once belonging to the feared Stasi secret police.

When the rain falls, this drain system turns into a musical instrument.