The spectacular history of spectacles on display.

The former home of a mad diplomat is said to still be marked in bloody, arcane scrawls.

A collection of biblical memorabilia.

This museum housed in a former brothel explores the past and present of sex work in Amsterdam.

This cheese shop also houses a museum devoted to Dutch dairy.

A beautifully eclectic mix of architectural styles.

The world's only museum devoted to the wonders of fluorescence.

This gorgeous reading room houses the oldest and largest art history library in the Netherlands.

From toys to kettles to scientific instruments, this German museum celebrates the beauty of 20th century design.

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

Fall down the rabbit hole into a surreal journey of human consciousness "from ass to soul."

One of the oldest cemeteries in Germany was originally used for victims of a cholera epidemic.

Metro station with a claim to rock n' roll fame.

At one of Berlin’s oldest churches, visitors can place mosaic tiles to help restore a medieval mural.

The skeletal frame of a decommissioned gas-pumping station offers breathtaking views of greater Berlin.

Cold war icon and onetime "hole" in the iron curtain.

One of downtown Berlin's last reminders of its Communist past.

The site of the famous Nazi book burning campaign of 1933 remembers its "Night of Shame".

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

This strange statue features a bust of the famous composer plopped atop a woman's body.

German and American troops joined forces to defend this fortress during the strangest battle of World War II.

A breathtaking viewing platform over the Alps.

Artfully arranged bones of 5,800 Austrians.

A neo-Gothic church built to thank God for saving the Emperor of Austria from an assassination.