Former military fort and site of untold horrors during WWII, this island may become the Adriatic's next luxury resort.

A tiny church on a man-made island in the Adriatic.

A curious cave church carved into the face of a cliff.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Museum celebrating the ocean, with the largest wunderkammer dedicated to sea exploration.

Elaborate mansions built by Roma residents in Soroca to show their success after centuries of discrimination.

At less than four inches in height, this iconic fictional character is the smallest public statue in all of Moldova.

There is a mouldering Jewish cemetery hidden away in the capital of Moldova.

A forgotten remnant of the Soviet Union, Transnistria is an unrecognized country hidden behind a heavily militarized border between Moldova and Ukraine.

The largest wine cellar in the world is a 150-mile network of underground caves near the capital of Moldova.

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

Dynastic Home of the De Piro Family.

This 50-foot-deep sinkhole created in the 14th century is home to rare plants and fungi.

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

This almost-forgotten underground dungeon housed several convicts over the years, including Caravaggio.

This unique building in the main square stands out among the city's typically Baroque architecture.

Ancient mysterious ruts carved in the bedrock.

Abandoned Roman Catholic chapel abused by Satanists before being restored.

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

Enigmatic tombs and cave dwellings on the outskirts of a rural village.

A centuries-old forgotten underworld lies beneath Malta.

Overshadowed by other, more famous Maltese catacombs, this ancient burial chamber has one of the best examples of a ritual agape table.

These lesser-known Maltese catacombs date back over 1,700 years.

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