Where lovers tie birch branches into long-lived knots.

One of the highest mountain passes in Europe has been ranked among the best driving roads in the world.

Europe’s oldest natural human mummy.

Where beer lovers can literally immerse themselves in beer.

The great Danube river starts here.

Budapest's Communist-era statues, banished to the suburbs.

This off-beat, quirky communism-themed bar isn't afraid to poke fun at its history.

An expansive complex of subterranean tunnels is all that remains of one of Europe's most formidable medieval fortresses.

Crushed coral and crystals give the sand its signature coloration.

A labyrinth of ancient tunnels hidden below the city holds the ruins of 2,500 years of history.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

Geothermal waterfalls in Tuscany.

Stalactites and stalagmites in a beautifully lit cave.

According to the local folklore, the myriad colors of this lake are the result of a lovelorn wizard's blunder.

The doodles of a genius line the walls of a secret room under the Medici Chapel, where they were hidden for nearly 500 years.

A submerged archeological park still holds the wonders of a Roman Sodom.

Hundreds of lucky felines haunt the ruins where Caesar was murdered.

An Italian crevasse filled with abandoned buildings gives visitors a look at the world without humans.

The crypts of Capuchin friars decorated with the bones of over 4,000 friars, including an entire "crypt of pelvises."

A series of haunting wooden totems are hidden in the woods surrounding a German environmental center.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

Ample proof that watery ends make for well-preserved, millenia-old mummies.

After years of being casually peed on by humans, this tree is peeing back.

Hamburgers are intensely proud of their tunnel beneath the river.