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

Erotic art covers the walls of the largest ancient pleasure palace.

The graveyard is filled with beautiful funerary art and boasts breathtaking views of Florence.

Renaissance hospital featuring a rotating door into which unwanted babies were dropped.

Armenian monks at an island monastery in the Venetian Lagoon make a rare rose petal jam.

An ancient artistic garden parlor full of hidden water wonders.

The Roman Emperor's lost summer home and grotto full of enormous sculptures sit along the Italian seashore.

A magnificent waterfall is also home to the remains of a Roman hydraulic engineering system.

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

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

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

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

This abandoned Brutalist treehouse is a hidden architectural relic.

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

The Sighignola summit on the Swiss border offers views so breathtaking it's been named one of the most beautiful places in Italy.

This hill made entirely of ancient Roman jars was simply a garbage dump to the people of the time.

In Rome’s Jewish ghetto, a 200-year-old bakery still makes the neighborhood’s historic sweets.

This large, circular tomb is the final resting place of the first emperor of Rome.

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

A fairytale island floats in the middle of Italy's little-known Lake Orta.

Installed in an act of one-upsmanship, the annual sundial in this church is also a symbolic victory for the Gregorian calendar.

This Roman arch marks the location of an ancient gate at one of the Seven Hills of Rome.

Natural cathedral designed by Italian artist Giuliano Mauri.

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