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

For patriotic Russians, this memorial honoring the Soviet soldiers who died liberating Berlin in 1945 is the most sacred location outside of Russia.

Celebrating the works of a beloved Italian actor, known for such cult films as 'They Call Me Trinity' and 'Watch Out, We’re Mad!'

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

A fascinating insight into daily life in the Eastern Bloc.

Thousands of coffin-like pillars make up this controversial Holocaust memorial.

The most visited, and possibly most controversial, museum in Germany.

Dedicated to a young woman who broke gender barriers at the University of Madrid.

A pair of gigantic baby heads greet passengers at Atocha Station.

This Roman statue is missing a limb from when the Venetians stole it from Constantinople during the Crusades.

Two stone columns flank the grand Venice square, but there were supposed to be three.

Go inside to really appreciate this 500-year-old technological masterpiece.

The incorrupt tongue of the patron saint of lost things is venerated in this basilica.

One of the largest squares in Europe contains an entire artificial island.

An ossuary built in 1210 to collect bones from the Ospedale Maggiore of Milan.

Small on the outside, big on the inside, this church is an astonishing act of visual deception.

Artistic tombs, monuments, and a beautiful "Hall of Fame" lurk inside this cemetery.

At least according to the Guinness World Records.

Artist Natividad Sánchez wrote a new ending for one of Roman mythology's tragic love stories.

An automaton perched above an classic clock and watch store

A stone slab in Madrid marks the point from which the distances of Spain's national roads are measured.

This sweet-toothed bear searching for snacks has been a symbol of Madrid for decades.

This grisly effigy displays an early Christian martyr who was skinned alive and beheaded.

A brutalist gem towering over the heart of Milan.