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

A small town Romanian cemetery filled with darkly humorous gravestones.

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

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

Crossing a suspension bridge above a forest is the only way to reach this 12th-century monastery.

A striking symbol of the Bulgarian capital.

An ancient Thracian city where fire rituals were practiced on the largest cult altar in Southeast Europe.

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

An abandoned saucer-shaped monument in the Bulgarian mountains.

These abandoned salt flats are now a haven for wildlife.

A crushed gate and giant bronze head serve as a reminder of Greece's fight for freedom.

Swarms of dainty flying insects swarm into the Petaloudes Valley to get busy.

The ruins of this monumental city founded by the first Roman Emperor are strangely overlooked by most travelers.

A small island with shimmering pink sands, home to loggerhead turtles and rare plants.

An autonomous republic of Orthodox monks.

The ruins of an abandoned medieval city where the last Byzantine emperor was crowned.

This legendary city has been a tourist attraction for centuries.

This ancient Greek place of assembly and marketplace is being revealed layer by layer below the modern Athens cityscape.

Perched on a spindly rock spire in a Greek archipelago, this lighthouse would make a perfect wizard's tower.

A 2,000-year-old computer demonstrates remarkable engineering and astronomical precision.

The walls of this medieval church are covered with perfectly preserved frescos, including a pristine example of the Dance of Death.

The "dragon babies" of southeastern Europe.

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

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.