An eerie, protected forest of old-growth oak trees, many of which are now dead.

This memorial park stands on the site of one of the largest mass executions of the Second World War.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

This 14th century castle withstood years of battle but is now sliding off the hills into the Danube.

A celebration of all things tacky, garish, and bizarrely creative in the Romanian capital.

This Romanian village may have been drowned, but it is long from forgotten.

A muddy alien landscape that is home to rare species of exotic plants.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

Romania's "Red Ravine" is a little-known natural wonder that bears a resemblance to the Grand Canyon.

No one knows who built this strange cave of worship or exactly why.

The romantic botanic tunnel feels like a well-kept secret.

A giant portrait of an ancient king looms over the river.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

Conspiracy theories and occult legends surround this mysterious natural rock formation.

Moss and stone turn this waterfall into an otherworldly liquid veil.

This sign marks the entrance to a tiny proto-state within the small country of Moldova.

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

This abandoned Soviet circus is slowly being restored to its Communist-era glory.

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

One of the world’s best microminiaturist, Nicolaï Siadristy displays his lifetime of tiny creations in this museum.

A Kyiv-based repository for all manners of discarded curiosities.

This derelict superstructure was a very important warning system for the Soviet military.

A subterranean Holocaust refuge within one of the world's longest cave systems.

The largest catacomb system in the world.