Climb around the high waterfalls on series of iron ladders and bridges within the wildest gorge in the Slovak Paradise.

The 700-year-old fortress was the site of Count Orlok's castle in "Nosferatu."

This natural monument has an origin story steeped in legend.

Popular river that runs through the remote Serbian municipality of Leskovac.

This mesmerizing medieval monastery-cave complex sits thousands of feet above ground overlooking a valley.

A sinuous path among steep cliffs creates a stunning sight in southwestern Serbia.

Legends of treasure and spirits flow from this this fairy tale-like oasis.

Structure built from the skulls of vanquished foes.

This solitary monastery may hold the remains of Vlad the Impaler (but probably not).

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

Rainwater transformed this old quarry into a peaceful pond you won't find in most tourist books.

Men in rubber-soled boots serve as your "brakes" on this toboggan ride Hemingway described as "exhilarating."

You can cross from one country to another in a single hop on this little bridge.

This gaping hole in the middle of a remote mountain lake looks like a portal to another dimension.

The stunning interior of this Gothic church is covered in ornate gold details.

The world's oldest bookshop still in operation.

This small chapel is built of human bones and decorated with a golden skeleton.

A 16th century chapel decorated with bones, skulls, and entire bodies hanging from the wall.

The world's northernmost ice hotel.

Norway's oldest cathedral still in use.

This giant boulder is pinched over a 1000-meter abyss by two mountains.

Walk 2,300 feet above the ground on the "Troll's Tongue."

These temples are among the oldest free-standing stone buildings in the world.

Enigmatic tombs and cave dwellings on the outskirts of a rural village.