Brass cobblestones mark the places where individual Holocaust victims were taken from their homes.

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

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

The famous sculptor left his mark on this Italian wall in an internationally protected example of street art.

A complex, nine-layer maze on the grounds of a Venetian doge's playground.

Eco-village hidden in the foothills of the Alps that created a massive system of psychedelic underground temples.

Crushed coral and crystals give the sand its signature coloration.

David Sedaris called it "The greatest shop in the world."

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

Over 50 exquisite hand-painted Renaissance maps decorate a Medici storage room.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

This enchanting 600-year-old tree is so magical it inspired the beloved tale of Pinocchio.

Geothermal waterfalls in Tuscany.

Stalactites and stalagmites in a beautifully lit cave.

This Venice bookstore has resigned itself to constant flooding by keeping its books in bathtubs and boats.

A submerged archeological park still holds the wonders of a Roman Sodom.

An alchemist's "magic door" stands in the middle of a Roman park.

Architectureal fantasy quarter of Rome.

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

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

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

Hundreds of lucky felines haunt the ruins where Caesar was murdered.