Exchange a book at the entrance of this medieval Lovere alley.

While you wait to cross the street at a traffic light in Mainz, you might notice that the light is staring back at you.

A famed artist's inspiring work of peace and tolerance.

A historic casino where Dostoyevsky is said to have lost it all on a single spin of the roulette wheel.

A UFO-shaped event building originally intended to be a science museum showcasing the future.

These seaside shelters once enjoyed by royalty remain a part of local history.

Regency-era excess on the English Coast.

The building is a gigantic piece of art inspired by the shape of a desert rose.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

Europe's largest prehistoric mound – burial site of a legendary king?

It's possible to walk inside one of the largest Neolithic tombs in Britain.

One of the smaller hillside chalk horses was designed and cut in by a group of local students in 1804.

This figure was cut into the hillside in 1937 to commemorate the coronation of King George VI.

This massive chalk hill carving is one of England's most beloved giant horse geoglyphs.

This ancient theater was once the home of fierce gladiatorial battles.

A unique underground structure dating back to the 1st century BC.

Historic medieval fortified city in southwest France.

For those late-night mollusk cravings.

Hundreds of prehistoric stones, arranged in perfect lines in a French field.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

The world's largest reflecting pool is just two centimeters deep.

Bordered by forest on three sides and the ocean on the other, the Great Dune of Pilat is the highest sand dune in Europe.