Latvia's symbolic mountain-shaped national library is home to millions of cultural tomes.

Though it was heavily modified, fragments of the original medieval cathedral still survive.

A unique park tells the geological history of Belarus in a national “map” of thousands of boulders and blue spruce.

A field filled with carved medieval tombstones called stećak.

The place where World War I began.

A mansion where wonders of Christmas are celebrated all year long.

The deepest sinkhole in Central Europe comes with a grisly tale and an unusual nickname: “The Stepmother Abyss.”

A spiral staircase twists to the top of this unusual Czech lookout tower.

A subterranean Holocaust refuge within one of the world's longest cave systems.

The European towns of Brașov and Râșnov each have proud signs reminiscent of the Hollywood sign.

Once an opulent Art Nouveau hotspot, the Constanța Casino is one of Romania's most beautiful abandoned buildings.

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

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

A gigantic statue of a Russian soldier watches over the ancient city of Plovdiv, a prominent reminder of the Soviet period in Bulgaria.

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

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

A spectacular Bulgarian cave resembling a devil's head with a waterfall rushing down its throat.

This historic black and white monastery is one of Bulgaria's architectural jewels.

A Bulgarian monument to Russia's role in World War II is constantly being painted in pop culture protest.

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

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

Thousands of objects tell the story of a city famous for its tobacco.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

When the river dries up, these stones start talking.