"Stairs of the Turks", a chalky white cliff eroded conveniently into stairs, allowing for easy pillaging.

Southern Italy's spinning top village.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Italian cave with exceptional acoustics and an unsavory history.

The spot where the fascist dictator made some of his most famous speeches including declaring war on Britain and France.

An underground paleo-Christian burial site composed of the remains of several cemeteries and Basilicas.

Romans built the world's tallest artificial waterfall in 271 BC.

This bronze boar's snout has been rubbed to a golden sheen by visitors seeking good fortune.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

This palatial spiral staircase was so unusual the name "snail" was given to the noble family who built it.

These "anatomical machines" are only one of the many strange items in this Italian crypt.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

This ritzy Italian market is built around a statue of an unforgiven heretic who was burned for his belief in an endless universe.

The engineering wonder and pleasure dome of a much-maligned emperor still holds undiscovered secrets.

Geothermal waterfalls in Tuscany.

The yawning maw of this pagan visage is said to bite off the hands of liars.

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

At this beautifully preserved Pre-Hispanic site, you can see ancient petroglyphs with depictions of llamas and alpacas.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

This enormous "cloth of the conquest" depicts the Norman invasion of England in mind-blowing detail.

The opulent home that inspired Tintin's Marlinspike Hall and the adventures within.

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

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

This ancient Roman bridge and aqueduct still stands as a wonder of classical construction.