Also known as the Temple of Poseidon, this is one of the best-preserved Greek temples in the world.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

This elaborate hole in the ground was built as a sacred site for an ancient civilization.

This one-of-a-kind archeological site is home to strange prehistoric ruins, the original use of which is still a mystery.

The titular "little arch" near this Italian resort is one of the most popular diving spots in the country.

This clifftop arch is a natural stunner.

This Arabesque Italian castle was built with a primitive, if ingenious, air-conditioning system.

Windblown rock formations in an ancient Roman quarry.

Ancient cave tombs known as the "houses of fairies."

This cliff-face port is considered a masterpiece of mining engineering.

Mysterious tombstones thought to be remnants of Atlantis.

A narrow opening between the mountains of the Amalfi Coast creates a scenic hidden beach.

This poignant art installation raises awareness of violence against women.

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

Southern Italy's spinning top village.

People have been living in the cave houses on this Italian hillside since the Neolithic era.

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

Gigantic mosaic sculptures of the figures on Tarot cards fill this colorful Tuscan garden.

Long-abandoned art nouveau baths beneath Milan's Piazza Oberdan.

A sinister pyramid in the Frari contains the heart of the famous neoclassical sculptor.

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

Ruins of a 10th century church tucked away deep in a botanical garden.

Crushed coral and crystals give the sand its signature coloration.

Go inside to really appreciate this 500-year-old technological masterpiece.