This collection of solar timekeepers includes the world's first digital sundial.

No shoes allowed on this trail, which is designed to be experienced barefoot.

A king's pet, a pope's gift, an artist's inspiration, and a tragic shipwreck.

Two very green residential towers cleaning the air in one of Europe's most polluted cities.

Artistic tombs, monuments, and a beautiful "Hall of Fame" lurk inside this cemetery.

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

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

This bike path was sunk below water level for maximum wonder.