A maze of underground tunnels beneath one of the most beautiful forts in Serbia.

Religious perseverance and cultural coexistence manifest in an architectural gem that multiple wars couldn't topple.

This dazzling Art Nouveau mansion is now home to the Modern Art Gallery Subotica.

This art installation pays homage to the famed stones of European lore.

For over 40 years, this quaint little house has teetered on a rock in the middle of a river.

An idyllic traditional timber village on a picturesque hill was built for a film.

A grand Yugoslav memorial to the group of partisans who fought and died resisting western Serbia’s Nazi occupation.

This structure atop a craggy cliff in one of the most beautiful parks in Paris boasts an unbeatable view.

France's most famous cemetery, with some of its most curious tombs.

A popular day's outing in Bovington consists of watching military tank driving practice.

A local museum honors the overlooked discoveries of Mary Anning, one of the first professional fossil hunters.

Cliffs full of fossils at the portal to England's Jurassic Coast.

A midnight snack that lights up the night.

This former quarry is now a vibrant labyrinth of magical in situ sculptures.

65 million-year-old chalk outcroppings mark the end of the Jurassic Coast.

A scattered trail of street art adds a pop of color to the city's stark structures.

A copy of the famous statue can be found in this Florence piazza, along with one of the most breathtaking views of the city below.

A misnamed well, with a deep dark past.

Recently restored menagerie of Victorian-era beasts.

A harem-inspired Moorish fantasy design in a Victorian-era Welsh castle.

The castle still holds traces of the abandoned Roman fort it was built atop.

An impromptu shrine appeared shortly after beloved "Torchwood" character Ianto Jones was killed off the show.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

The unusual sculptures are believed to be powerful political symbols.