The largest catacomb system in the world.

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

This bone-filled cave got its name after they found 140 bear skeletons inside.

This fairy-tale castle would make Dracula (who is said to have been imprisoned there) jealous.

The Natural History Museum that time forgot.

The preserved arm of a third-century sorcerer is believed to have the power to lift curses and spells.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

Gigantic Romanian salt mines used to heal respiratory conditions.

A stunning 18th century pharmacy and medieval chemist's collection.

Packed to the ceiling with antique taxidermy and hunting arms.

Structure built from the skulls of vanquished foes.

Sealing couples' love since just after World War I.

Stone age urban planning.

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

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

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

A Roman monument to their own civil engineering prowess.

A Serbian church lit by chandeliers made of weapons.

This hunter-gatherer architecture is believed to be the oldest religious complex known.

What is left of the pillar of Saint Simeon, the voluntary martyr who climbed the column to give his sermons, remaining perched there for thirty-seven years.

Mediterranean castle on a tiny Turkish island.

The largest Neolithic ruins in the world hide a notably clean prehistoric metropolis.

In this historic region, homes and churches are carved into ancient volcanic rock formations.

A magnificent, glittering building tucked into a tiny Bulgarian mountain town.