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

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

The largest free-standing aquarium in the world resides in a hotel lobby in Berlin.

This massive statue is the personification of Bavaria and the first colossal statue of the modern period composed of bronze.

A trail of footprints discovered after a landslide was left not by the Devil, as originally believed, but by an early human ancestor.

This strange sculpture depicts a giant nightmare hare crushing a man to death beneath its colossal bulk.

A giant snail sculpture looking longingly at the German traffic museum.

This reconstructed Norman castle is the world's most accurate, from location to livestock.

A line number in Amsterdam that will likely never be used again due to its tragic history.

In the Scottish Highlands, this 13th-century castle ruin is hidden at the end of a farm track.

It's believed that these columns marked the end of the Via Appia.

This unusual elevator doesn’t stop or slow down.

The European equivalent of the Hollywood Walk of Fame is slowly spreading over the entire city.

This museum explores the history of the city's public transportation. Its collection includes the world's oldest preserved electric trolley car.

At the base of this tower, a plaque marks the original center point of the Netherlands.

This artificial lake surrounded by Brutalist architecture served as a stand-in for futuristic Britain in Stanley Kubrick's 'A Clockwork Orange.'

A never-inhabited village that was built as part of Mussolini's agricultural reforms.

An ornate sculpture of an ox in repose marks the former entrance to Nuremberg's medieval meat market, which was destroyed during World War II.

The bridge that cost Germany a World Heritage Site.

Only a few walls remain of the last church the Pilgrims used before they sailed to North America.

This 18th-century fort surrounded by a moat was used to store gun powder and ammunition, and now sits in the middle of a large part in Dublin.

The church and nearby castle are all that remains of a medieval village, mysteriously abandoned.

This watchtower once presided over the Berlin Wall.

Built as a training camp, this site became a detainment center for prisoners of war and German civilians during World War I.