Fortified medieval tower house with lovely roof garden.

The forbidden island of the Tuscan Archipelago may still contain buried treasure.

Venice's island of the dead.

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

Architectureal fantasy quarter of Rome.

One of the largest caves in the world open to the public.

A Nesting Doll of Churches.

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

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

A treasure trove of Renaissance-era funerary art in a Roman church built on top of Nero's grave.

The now-abandoned Fascist summer colony served a dark purpose during World War II.

An abandoned Roman salami factory has found new life as an art space home to 200 squatters.

The abandoned "Ghost Mansion" was left to decay in the mountains of Northern Italy.

The martyr's wax-enhanced skeletal remains lie preserved in a glass case in the Santa Maria della Vittoria in Rome.

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

Two stone columns flank the grand Venice square, but there were supposed to be three.

A stunning hermit's shrine on a steep rocky spur in Northern Italy.

A visionary Italian architect created an impressive cluster of concrete structures for a family's private tomb.

A domed disco abandoned since the '70s now attracts artists and explorers under its unique roof.

The world's largest "Christmas tree" is illuminated by hundreds of lights stretching 2,000 feet up the slope of Mount Ingino.

The secret medieval communication system will whisk your words above the noise of the crowd.

The 1,000-year-old abbey is the birthplace of modern musical notation.

This curious building hides eclectic details like medieval gargoyles alongside naked angels and Art Nouveau mosaics.

A slightly creepy gallery of plaster cast models in the same museum as Michelangelo's David.