A Red Cross memorial museum at the site of the Niš concentration camp that operated for four eventful years during World War II.

Destroyed Serbian army headquarters sits half crumbled in a largely revitalized Belgrade.

A pair of connected skyscrapers form this symbolic gateway.

Nikola Tesla's ashes are held in a golden sphere, surrounded by his works.

Structure built from the skulls of vanquished foes.

A haunted outpost in Moldova, where guards are said to have fired at a ghostly figure.

A statue dedicated to the founders of communism.

Once the tallest building in Chisinau, this unique tower is a relic of Soviet architecture.

A unique collection of Soviet military artifacts lies hidden away in a disused train, in the unrecognized Eastern European republic of Transnistria.

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

This equestrian statue of Constantine the Great has been the subject of criticism for centuries.

This lush, scenic spot was carved by the turquoise waters of the Radovna.

Strange rumors surround the artist who created these solemn metal guard dogs.

A whimsical bridge adorned with decorative dragons.

This one-time health resort was used by aristocrats around the world.

As one of the world's largest hydroelectric dams this plant took two countries to get built.

An underexplored, 130-foot tropical waterfall that you will have all to yourself.

The inspiration for the Patagonia Clothing logo, Cerro Fitz Roy turns pink at sunrise.

A series of waterfalls so massive they straddle the border of Argentina and Brazil.

This stunning mass of ice spans 121 square miles and is still growing.

Mother Nature outdoes herself with this stunningly beautiful set of caves carved into marble.

This was once the center of the Birdman cult, and is now a World Heritage Site.

A volcanic crater that visitors can look inside.

The world's most remote airport.