The ridged layers that make up this river canyon represent Earth's geological history.

This 15th-century Serbian Orthodox monastery also contained a school for illuminating manuscripts.

The interior of this Serbian royal family's mausoleum is covered with exquisite mosaics.

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

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

This region of Slovakia boasts some of the most plentiful opal mines in the world.

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."

A perfectly preserved hill village where the buildings are painted like white lace.

This small Slovenian town has become a magnet for microbreweries.

A cemetery for Slovenian notables also serves as a popular recreation space.

An otherworldly alpine pasture with its own unique microculture that recalls Middle Earth.

Castle and secret tunnel withstood a siege until its owner was killed by the Holy Roman Empire, while sitting on the toilet.

This Gothic church houses ornate royal tombs and a magnificent gilded altarpiece.

This museum is known as the "Land of the Dinosaurs," but its full-scale dino models are just the start.

More than 70 detailed dioramas—including some rather nontraditional ones—fill this charming museum.

Head to the mountains to catch a glimpse of Spain's endangered subspecies of brown bear.

See replicas of Europe's most famous cave paintings and even some of the animals that feature in the art.

32,000 tiny soldiers are posed in 23 historical settings.

This Arab fortress was once the largest citadel in Western Europe.

A wonderful collection of fossilized dinosaurs and other creatures that roamed the landscape millions of years ago.

A reproduction of the famous prehistoric cave paintings is hidden underground at the National Archaeological Museum.

Spanish architects used seized Muslim gravestones to rebuild parts of the fortress.

This influential Renaissance-era library was once the haunt of kings and monks.