This hydrochronometer was invented by a Dominican monk and is a prime feature in this garden.

A colossal aqueduct from the second century B.C., deeply hidden in a gorge on the outskirts of Rome.

Roman politician Herodes Atticus built this nymphaeum to honor his wife, whom he may have murdered.

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

Romans decided this 16th-century "talking statue" was so ugly, they named it after a primate.

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

The former home of an Italian artist is now a shrine to his ambitious works.

Also known as the Square Colosseum, this building is a prime example of fascist-era rationalist architecture.

A wunderkammer of curious objects and intriguing art nestled within a hub of ancient Roman sites.

The Pope’s secret escape route.

A hospital where antique dolls are given new life.

This beautiful park on the outskirts of Rome protects the ruins of two colossal ancient aqueducts.

Rome's semi-secret peephole vista is also a former Crusader stronghold.

This magnificent abandoned hotel has long been haunted by its Nazi past.

A fantastical and futuristic temple of light built from nine monumental glass veils.

A beautiful riverside mansion where the intellectual life of early-20th-century Argentina flourished.

The house of a former Argentinian president stands protected within a large glass case.

Xul Solar was an artist of alternate worlds, inventor of languages, and dreamer of utopias.

An extraordinary house museum and cabinet of curiosities in the heart of Florence.

The remains of a 1st-century aristocratic Roman town house featuring beautiful well-preserved mosaics.

This spectacular dome managed to survive after being bombed in World War II, in an event known as the "Miracle of Mosta."

An abandoned set from the 1980 film "Popeye," claimed and repurposed as a theme park by creative locals.

Famous landmarks and structures from across Italy fill this miniature park.

A modest museum in the final home of Italian poet and father of modern Italian, Francesco Petrarca.