This Communist-era residential block is one of the longest residential building in Europe.

This fairytale inspired, warped building houses restaurants, shops, and a radio station.

A haunting deserted hotel is a favorite with artists and photographers.

A World War II torpedo launch station abandoned off the Polish coast.

The rusting hulk of a Soviet warship sits on a Polish beach.

Deep in a Polish forest, this collection of Iron Age megaliths still holds onto many of its ancient secrets.

This historic electric train has operated with regularity since the early 1900s.

Skulls from the plague of 1656 and World War II bombings are united by a cult dedicated to caring for the ancient dead.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

This monumental fountain has moved around the city multiple times.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

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

An elegant church is home to a remarkably detailed mosaic floor depicting the Garden of Eden.

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

Thousands of well-dressed mummies below a monastery.

Behind medieval walls in a corner of bustling Palermo is a breathtaking former mosque once inhabited by a wolf-taming hermit.

Cave shrine on Monte Pellegrino.

The world's most active stratovolcano is almost always erupting.

A mysterious ancient elephant said to possess magic powers is now the symbol of a Sicilian city.

The fishing boats that moor in this small lagoon enter and leave through a tunnel to the sea.

Two geological phenomena in one precarious locale: a towering stone window, and a deep blue void.

In the sleepy town of Gozo exists a reproduction of the entire town of Bethlehem.

The ruins of a megalithic monument sit right in the garden of a luxurious Maltese resort.

These sprawling military housing quarters from the 1960s are now defunct and hidden in plain sight on Malta’s Mediterranean coast.