This hidden art nouveau gem was designed by an architect in search of a national style.

Time stands still at this serene burial ground in the center of Budapest.

The mummified right fist of a 1,000-year-old saint-king sits inside an ornate golden reliquary.

Also known as Uncle Karl, the beloved bronze copper keeps a watchful eye on St. Stephen’s Basilica while people rub his lucky belly.

From Austrians to Nazis to Soviets, this historic Budapest fortress has a history as complex as the city itself.

Some of the greatest minds in the history of Hungarian art and science converged in this café.

This quiet, unassuming spot in Budapest was the birthplace of the bloody 1956 Hungarian Revolution.

A 19th century artistocrat's mansion, turned into a library, hidden in a modern library.

The largest statue of this convex, homogeneous object with just one stable and one unstable equilibrium point.

A scene from one of Hungary's most famous novels.

An ancient Roman snake god, carved expertly into stone.

The kitsch mansion of the former Romanian president Nicolae Ceaușescu features a golden bathroom.

Once the legendary capital of the Dacian Kingdom, this city has been reduced to mere ruins.

A spooky spot along the road where things mysteriously seem to move uphill by themselves.

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

A fire once nearly devoured this gorgeous 14th-century Gothic cathedral.

This snug medieval lane is one of the narrowest streets in the world.

This communist behemoth is the heaviest building in the world and a legacy of a brutal regime.

A muddy alien landscape that is home to rare species of exotic plants.

Even drowned in an ocean of toxic waste, the remnants of this Romanian village stand tall.

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

Conspiracy theories and occult legends surround this mysterious natural rock formation.

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

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