Mounds, rune stones, and a 1,000-year-old church, left behind by Denmark's first two kings.

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

The world's largest maze is a nature park with nearly 200 decision points.

A natural wonder in south Denmark.

One of the two original gateways into the Kasbah, this gateway is a nesting site for storks.

This vast masterpiece of Moroccan architecture spreads across 20 acres.

Fortune tellers, snake charmers, poets, and storytellers all gather on this historic square in Morocco.

Morocco's largest Jewish cemetery.

This abandoned Slovenian military barracks has become a punky-political art squat.

A whimsical bridge adorned with decorative dragons.

A trough of 700 strange bronze faces runs through a narrow alley in Ljubljana's old town.

This surreal memorial/cemetery is a necropolis of crumbling stonework and puzzle-shaped headstones.

A former bank seized as a sniper vantage point during the Bosnian War is now a secret graffiti art gallery.

Bridge that died in war and was resurected.

A curious little museum dedicated to the furry feline in the cat haven that is Old Town Kotor.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

Once the fallout shelter of a dictator, this sprawling bunker is now a combined history museum and contemporary art gallery.

An Albanian monument to the Communism that nearly crushed the country is now a crumbling wreck.

This Slovak bridge is known both for its connection to a national uprising and its UFO-shaped eatery.

This fortress dates back to the 6th century and is also the site of a controversial abandoned restoration project.

A striking symbol of the Bulgarian capital.

"Holy Wisdom" overlooks the city that became its namesake.

This massive collection of British military artifacts includes the heartbreaking personal letters of the men in the trenches of WWI.

An unusual round church in London with a Templar past.