This once-forgotten oasis in the middle of Lisbon was first created over a century ago quite by accident.

Legacy of the earthquake that nearly wiped Lisbon off the face of the Earth.

This eccentrically decorated palace is replete with grottoes, fountains, tunnels, and caves.

This hidden alley near the location of Rome's first theater was the site of a curious miracle.

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

This one-of-a-kind Roman arch is not actually dedicated to the god Janus.

Italian horror legend Dario Argento’s own shop hides a sinister museum-dungeon in the basement.

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

In a city that boasts four separate inclined cable railways, this is one of the busiest funicular lines in the world.

A sulfuric hellscape in southern Italy.

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

This park on the outskirts of Rome boasts two ancient Roman aqueducts and a medieval tower.

A monumental fountain in Rome features a large statue of Moses that has been criticized for centuries.

One of the world's oldest working clocks is curiously missing the Zodiac sign of Libra.

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

A massive marble foot is tucked away in a small alley near the Pantheon.

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

The only remaining arch of the oldest stone bridge in Rome stands in the middle of the Tiber.

The bomb-ravaged remains of of a colossal Neptune.

Southern Italy's spinning top village.

The walls and streets of the ancient city are peppered with penises.

This small, ancient Roman temple was once a church dedicated to the patron saint of penitents.

Over 100 towers were built in Bologna during the Middle Ages, but only 22 survive.

This ancient trail climbs the mountain where a Latin League cult worshipped Jupiter, its main deity.