An early Portuguese serial killer's head is alarmingly well preserved in a jar at the University of Lisbon.

A garden in Lisbon filled with giant porcelain creatures.

The risqué mixed-media sculptures are supposedly a metaphor for Czech politics.

This unassuming bookstore in the heart of Madrid is one of the oldest in Spain.

Home to 10,000 medical specimens including the remains of Rudolf Virchow's extensive collection of pathological specimens.

Puppet theater and museum holding a collection of more than 300.

From Iggy Pop to David Bowie to Nick Cave, this regal music studio has served some of the all time greats.

These former Nazi anti-aircraft towers offer a singular view of the north of Berlin in the summer, and a sanctuary for bats in winter.

Visitors can explore the role of mysticism throughout the ages inside this interactive museum of magic.

Super-heavy Nazi architectural experiment.

This World War II bunker now survives as a documentation of the Nazi regime and war crimes.

On the Spree bank, discover one of the last reminders of a symbolic wall that divided, and was torn down by the people.

A fascinating insight into daily life in the Eastern Bloc.

This Berlin island is home to a flock of free-roaming peacocks, as well as a historic ivory folly.

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

This former Baroque palace on the historic Calle Montcada is a rare architectural gem and was once the meeting place of an aristocratic scholarly society.

A stately palace has been converted into the world's largest cannabis museum.

Week-long block party becomes a competition for the best decorated street.

Barcelona's historic 19th-century sewers, whose foundations were laid in medieval times, are open to the public for exploring.

An unusual stroll through gentlemen's erotica demonstrates that pornography is timeless.

Gaudí's famously flamboyant architectural style is on full display in this sprawling park and garden.

Gaze upon chocolate sculptures depicting everything from chariot races to Gaudí's famous church at this shrine to sweets.

Featuring Torres Strait Islander cuisine and Australia's first indigenous bar.

One of the oldest theaters in Australia, it's also said to be haunted by a performer who died on stage.