This enormous sinkhole hides a secret world created from divine wrath.

Legend said this huge, gnarled tree sheltered the saint during a storm.

A rococo room covered entirely in porcelain originally constructed for another royal residence.

This medieval mountain town is also known as the "Village of Streams."

This small but lovely sinkhole lake is the last remnant of a great prehistoric water basin.

This is the oldest Roman-made bridge in the city still existing in its original state.

Featuring the last fully walkable parapet walkway in Europe.

The pristine waters crossing this forest form a hidden waterfall among the dense vegetation.

Known as the Royal Palace of the Euganean Hills, this often overlooked castle has been home for multiple noble families over the centuries.

A medieval stronghold rising over the ruins of ancient Roman villas along Rome's southern coast.

This gallery commissioned by Cardinal Spada is known for its magnificent optical illusion.

Leveled by an earthquake, this Italian village is now preserved as a massive concrete art project.

These pools have been abandoned for over 20 years.

A sudden, striking cluster of hills south of Padua has been attracting visitors for centuries.

The Bourbon royal family had this unique octagonal hunting "cottage" built on a tiny islet in Lake Fusaro.

This curious, round temple is the oldest still-standing marble building in Rome.

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

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

Take a giant yellow bird cage to the top of Elba's highest mountain.

This scenic fortress dates back at least 2,400 years to the time of Magna Graecia.

Stare out over the lagoon and beyond from this 10th-century campanile on the island where the city of Venice began.

This triumphal 16th-century arched gateway leads to the oldest street in Palermo.

Buried next to Pompeii, this lesser-known Roman villa was the opulent vacation home of Emperor Nero's wife.

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