In this brilliant blue spring in Germany, legend has it that a sad mermaid learned to finally laugh.

This 170-year-old Swiss guesthouse built into the side of a mountain is best accessed by a cable car.

A beautiful gorge filled with streams and waterfalls.

Walk inside a half mile long crevice right outside the town of Garmisch Partenkirchen.

Liechtenstein's royal family calls this medieval alpine castle home.

The oldest surviving wooden bridge over Rhine lets travelers cross easily from Switzerland to Liechtensten.

Designed to mark the geographical center of France.

The birthplace of the ferocious William the Conqueror, this castle is awash in medieval history.

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

A daring D-Day assault by U.S. Army Rangers is commemorated atop the high cliffs of this strategic point.

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.

This 1,400-year-old abbey was once a powerhouse for music and intellectualism known across Normandy.

A set of 27 bamboo tubes creates an eerie soundscape that changes with the wind.

A grassy pyramid named after a French battle.

A late-medieval Dutch castle with trick fountains in its whimsical water gardens.