Three sinkholes filled with warm, crystal-clear water reached by a horse-driven cart on an old train track through the jungle.

A magical sinkhole on the Yucatán Peninsula is adorned with mini waterfalls and hanging vines.

A mysterious light floating in the trees of Arkansas may be a piezoelectric effect.

A mysterious light in the wood, rumoured to be the the ghost of a railroad brakeman.

All you ever needed or wanted to know about America's favorite whiskey, but not a drop to drink.

The bridge that cost Germany a World Heritage Site.

When the rain falls, this drain system turns into a musical instrument.

An idyllic swimming pool tells the tale of Hemingway's trouble with women.

The former home of the Nobel Prize-winning American writer is now home to dozens of six-toed cats.

A monument celebrating the idea of reaching inaccessible places.