A spiralling hourglass-shaped tower rises from the forests in Denmark.

An air of mystery pervades this modern-day singing Stonehenge.

This amazingly preserved Doric temple was abandoned before it was ever completed.

This abandoned Olympic skiing facility still bears the scars of the Siege of Sarajevo.

Celebrated example of Ottoman architecture that also served as a site for brutal massacres.

One of the largest ochre quarries in the world, hidden in a limestone landscape.

Even France's favorite aquatic son Jacques Cousteau, couldn't get to the bottom of it.

Sidney Scurvy, the interactive computer sailor, takes you on a journey to discover the everyday lives of Cook and his men.

The gloomy ruins that inspired Bram Stoker to bring Dracula to life.

Harry Potter’s Hogsmeade Station is also a charming blast from the past situated in North Yorkshire.

These sea caves are the source of Xigia Beach's distinct aroma.

This remote church calls a tiny island its sanctuary.

A medieval bridge stretches over a sulfur-rich river that leads to year-round natural hot springs.

A naturally beautiful, seemingly bottomless deep blue spring.

The cross-shaped memorial is filled with kitschy tributes to the late pop star.

Space-age monument to an early 20th-century uprising.

An abandoned lighthouse awaits its destiny: being buried under shifting sand.

This remote island, home to the easternmost point in Denmark, once hosted pirates and a military fortress.

The largest of Denmark's seven mysterious round churches stands on an island in the Baltic Sea.

Villas that once served as playgrounds for the rich now fall away in decay.

A steampunk-styled three-floor factory churning out art, activism, and electronic beats.

Hidden in a secluded Greek cove is a pristine beach marred only by the rusting smuggler's hulk stranded on its shores.

This semi-secret storybook hedge maze is also the oldest garden in the city.

A natural wonder in south Denmark.