Known as the site of 'El Dorado,' this mysterious lake is rumored to hold gold beneath its waters.

Colombia's biggest botanical garden contains plants from all across the country.

This massive sculptural work outside of Paris was four decades in the making—and it's still not quite complete.

This famous writer's tombstone is a literary pilgrimage site that was publicly defiled by a rival.

Legend has it this fountain built to symbolize the Pope’s power hides a strange secret concerning Neptune's manliness.

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

A trail of iron footwear stands as a monument to the thousands executed along this riverbank during WWII.

The oldest garden in Prague, once part of an medieval orchard.

The mental institution where Van Gogh created some of his most famous work now allows guests to walk in the artist's footsteps.