A Romanesque tower appears when water levels drop.

Village situated on a narrow volcanic escarpment.

Wonderland replication in progress by one persistent man.

A darkly erotic open-air statuary in Catalonia.

At the foot of a waterfall lies a peaceful swimming lagoon and evidence of over 60,000 years of human habitation.

Haunting monument to the German Jewish philosopher who died while fleeing fascism.

This tiny Bulgarian town offers a stunning location in the mountains and a storied history.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

The growing stones of Romania.

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

This elaborately decorated, fairytale-like Romanian royal palace is one of the most striking castles in Europe.

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

The remarkably well-preserved final resting place of a powerful ancient Thracian king.

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

An architectural marvel that spans the Arda River, and has stories of a haunted past.

In a long-dry lake bed, these groups of massive stone pillars bear a striking resemblance to clumps of everyone's favorite fungi.

Outstanding, eerie frescoes and decorations fill this 19th-century monastery.

A Romanian church built from one single oak.

One of the oldest churches in Romania is believed to have been built on the site of a pagan temple.

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

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

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

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

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