An ancient Viking runestone hidden in plain view in Stockholm's old town.

Too much gossip or just missing curfew could land you in here for a couple of days.

The walls and streets of the ancient city are peppered with penises.

Milan's duomo is covered in beautiful carving including a curious "dinosaur-like" beast.

Ancient snack bar of the Roman Empire re-opened.

This picturesque Umbrian city has a subterranean side that has long remained hidden.

This quaint Italian town keeps losing ground as the sides of its plateau slowly erode.

Five candy-colored villages on the Italian Riviera.

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

Geothermal waterfalls in Tuscany.

This centuries-old rooster survived a devastating fire.

Stockholm's tiniest statue is of a small boy looking at the Moon.

A wooden street sign is the last remnant of this 400-year-old alleyway.

Stockholm's narrowest alley is barely over two feet wide.

A man has revenged his true love's betrayal through tears and stone genitalia.

This gem from the industrial age helps visitors and residents alike traverse hilly Stockholm.

It houses the remains of a 17th-century version of the Titanic.

The Swedish flag over this small naval fort signals that the nation is at peace.

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

These medieval skyscrapers dominate the skyline of this small Tuscan town.

A 16th-century horror show built in a lovely Italian garden.

This immaculate and historic water garden culminates in a massive stone dining table with an inset fountain for chilling the wine of the Cardinal's guests.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

A Trabant car, a kangaroo statue, and a plethora of plants take over this abandoned-factory-turned-bar.