Thousands of coffin-like pillars make up this controversial Holocaust memorial.

This jaw-dropping 19th-century bridge uses its reflection to form what appears to be a perfect circle.

Tens of thousands of ancient rock carvings hidden in the heart of a French national park.

A sublime medieval path adorns the marble floor of one of the most beautiful Gothic cathedrals in France.

These crumbling Nazi artillery bunkers are now fair game for massive graffiti projects.

A ghostly and forgotten art deco bathhouse by the windy shore of Dunkirk, weathered but still standing.

This 1,300 year old monastery built atop a single rock was once only accessible depending on the whims of the tide.

Rows of multicolored bathing huts paint the sand dunes with pops of color.

A memorial to the nearly 10,000 American soldiers laid to rest on the beaches of Normandy during WWII.

Remains of the artificial harbours invented for the Allied invasion of Normandy can still be seen at sea.

In 1927, a biplane disappeared while attempting to complete the first non-stop transatlantic flight between Paris and New York City. This memorial stands at the last place it was seen.

A beautiful lighthouse with as many steps as days in the year, as many windows as weeks, and as many levels as months.

These old World War II fortifications have been transformed into an unusual equine attraction.

A perfectly circular stronghold constructed in the 10th century is now a nucleus of Viking culture housing a museum, village, and reenactment of an epic Viking battle.

This bridge's unique architecture honors nautical heritage and encourages self-awareness.

An enormous playhouse designed to look like 21 stacked Lego bricks, with another 25 million colorful Legos inside.

This colorful artistic feature atop a Danish art gallery allows visitors to stroll through a rainbow.

A natural wonder in south Denmark.

Danish tourist destination well known for open stalls where vendors sell marijuana on the street.

The de facto symbol of Copenhagen is this bronze fairytale which cannot seem to keep its head for very long.

Copenhagen's celebrated theme park and gardens.

An ultra-modern diversity park in Denmark has turned an entire city block electric pink.

A series of playful yellow penguins share a serious message about the environment.

Despite attempts by local police to discourage it, Beatles-inspired graffiti has been a means for artists to air grievances for decades.