Watch cheese-flipping robots in action at this factory and museum.

This stone in Lake Geneva was once the reference point used to determine altitude in Switzerland.

On the side of a building, a depiction of the woman who became a local legend by tossing soup out her window.

One of the longest wooden benches in the world snakes around Geneva's Treille Promenade.

The world's largest second-hand graces a clock surrounded by constantly changing flower beds. 

CERN's beautiful, bending sculpture is a tribute to the spread of knowledge.

Ancient snack bar of the Roman Empire re-opened.

Erotic art covers the walls of the largest ancient pleasure palace.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Before it was buried by volcanic ash, this fast-food restaurant fed the hungry hordes of ancient Rome.

Europe's oldest still-operational tea farm also boasts a spectacular view.

An underground magnet for ever-changing street art.

Unruly residents were housed in this one-person cell until the Black Maria arrived.

Named for a Greek oracle that interpreted the words of Zeus, this beautifully-restored manor home was once home to the architect of the Marshall Plan.

True to its name, this little house presents like a dollhouse, and surprising details are revealed with a quick peek through the window.

The industrial architecture honors the laborers who brought the Exposition Universelle of 1900 to life.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

One of few vertical lava tubes in the world accessible by foot.

These unusual rooms on wheels are holdovers from the 1960s.

Perhaps the most spectacular grotto along the Algarve coastline.

Building owners can take out tiles for free at this repository for historic building materials.

This iconic Parisian bookstore doubles as the "Tumbleweed Hotel" for traveling writers.

An ancient and majestic fortress that played an integral role in Portugal's road to independence.

This unreal Portuguese palace looks as though it's made from a pile of different castles.