These coffin-like Brutalist balconies were inspired by a nearby mine.

A living descendant of the famous tree that helped Isaac Newton develop the theory of gravity.

Not quite the cultural gateway between China and Sweden its designer imagined.

A replica of the beloved character's house, modeled after the author's own drawings.

A catapult rock from Gotland’s 13th-century civil war is still lodged in Scandinavia's best-preserved medieval city wall.

Ancient burial grounds of the wealthy.

An eclectic sculpture park rises atop a giant pile of ashes in Sweden.

According to legend, this boat-shaped henge is built over the grave of a mythic king.

Crooked windswept pines give this old forest an enchanted and magical look.

Founded in the 4th-century, the town of Pernik plays host to the Surva Carnival⁠—a magnificent display of masked Kukeri dancers.

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

UNESCO-protected ancient burial ground.

An abandoned saucer-shaped monument in the Bulgarian mountains.

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

The ceiling of Prohodna Cave in northern Bulgaria affords a peek at the sky via two deity-sized-eye-shaped holes.

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

Underneath this Byzantinian church lies a necropolis filled with ancient tombs and the ruins of previous churches.

"Unity, Creativity, Beauty."

A new sculpture calls attention to climate change in the centuries-old city it threatens.

According to tradition this is the oldest church in Venice, but its actual age is a mystery.

The walls of Germany's Parliament still show the scars of the Red Army takeover in World War II.

A 12th-century fortress containing some of Berlin's oldest buildings.

The most visited, and possibly most controversial, museum in Germany.

A subterranean display of public art and architecture.