Climb to the top of its spiral spire for spectacular views of Copenhagen.

Beneath Denmark's Højbro bridge, a bronze merman and his seven sons forever mourn for the mother and wife who left them for land.

Denmark’s never-ending bridge.

A pair of connected skyscrapers form this symbolic gateway.

A misnamed well, with a deep dark past.

This enormous abstract sculpture is part jungle gym, part elaborate noise-making machine.

The place where World War I began.

This unusual hostel provides a glimpse of life in a city under siege.

This historic cemetery was inaccessible for several years due to dozens of land mines.

A bridge destroyed three times: once as a ruse, then in an actual attack, and finally for the movies.

Bridge that died in war and was resurected.

An apparition of Virgin Mary in Herzegovina.

This Croatian island is for sale but no one is buying due to the dozens of accused Nazi sympathizers who were massacred there after WWII.

A wunderkammer of gold and silver reliquaries and ancient saintly bones.

The complex has been abandoned since the Croatian War of Independence, barring a stint as a set for 'Game of Thrones.'

The now-overgrown beach resort was once frequented by Yugoslav military elite.

This picturesque medieval monastery guards a small trove of historic treasures.

Large, airy hallways hide within an impenetrable fortress that beckons urban explorers.

The big toe of this towering monument to a Croatian national hero is worn from years of superstitious rubbing.

A forgotten and crumbling Yugoslav monument to the victims of fascism.

The only gulag ever to exist in socialist Yugoslavia.

Humble beginnings for one of the world's most famous scientists.

Just a few miles from Novalja, a strange geological oddity has left scientists baffled.

Now abandoned, the world's first torpedo factory is crumbling into the sea.