An alien landscape on the banks of the Aegean Sea.

A miniature desert appears out of nowhere on the lush isle of Lemnos, like something out of a Greek myth.

This massive concrete sculpture is said to be the heaviest communist monument on Earth.

A Serbian church lit by chandeliers made of weapons.

See how paper is made the old-fashioned way.

Bizarrely shaped rock formations in northwest Bulgaria come with equally bizarre legends.

The second-largest Jewish temple in Bulgaria was deserted after World War II, seized by the communist government and then abandoned again.

The final resting place of one of the first alleged vampires.

At this archaeological site, visitors can explore the ruins of the capital of the former Roman province of Moesia.

A museum dedicated to the former country.

Ride in 1960s style on the private luxury train Marshal Josip Tito used to travel around Yugoslavia.

The only known mosaic depicting the Greek god of sleep, Hypnos.

Backwards hour and minute hands and a timing mechanism that fluctuates with the temperature led to this clock tower's local nickname.

A musical instrument played by the sea.

A series of metal trumpets in the heart of Ruma represents the seven Vojvodina People's Liberation Brigades.

Built as an anti-fascist tribute, this surreal Yugoslav memorial became an unwelcome symbol after the Croatian war for independence.

A small self-proclaimed micro-state located on a piece of disputed territory between Croatia and Serbia, near Liberland.

A self-proclaimed libertarian micro-state on a tiny bit of disputed territory between Serbia and Croatia.

A chain of 16 wondrous lakes formed as a result of the gradual dissolution of soluble layers of bedrock.

A forgotten and crumbling Yugoslav monument to the victims of fascism.

A miniature train-ride through Slovenia's largest cave system.

One of the tallest bell towers in Italy plays a particular melody at just two times each day.

The world's oldest surviving anatomical theater, where "the dead are pleased to help the living."

This 18th-century dissection theater's frescoes display a gorgeous tension between the terrestrial and esoteric.