The mysterious wonder of an underground waterfall is illuminated by multicolored lights.

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

Underneath this water pump, Annie Sullivan helped Keller speak her first words.

Built in 1547, these ruins lie on a rocky promontory in Ballintoy jutting into the wild ocean waters below.

Northern Ireland's Brobdingnagian stepping stones.

The ruins of this medieval castle in Northern Ireland have inspired artists from C.S. Lewis to Led Zeppelin.

A trail of "Game of Thrones"-themed doors carved from fallen trees from the iconic Dark Hedges.

The quiet field that inspired one of the most famous songs of all time.

The Liverpool street made famous by the Beatles is real.

One of the few standing Roman lighthouses and a labyrinth of tunnels are a couple of the secrets at this historic castle.

A island reachable by a causeway at low tide is possibly one of the earliest Western European locations to be identified in text.

Puzzles within puzzles hide a golden treasure in this hedge maze.

This medieval sanctuary's tree-framed door looks like a portal to a mythical realm.

The atmospheric road was never meant to be so creepy.

400 million years of erosion shaped these fascinating seaside caves, which made an appearance on 'Game of Thrones.'

Richard III supposedly disposed of his nephews' bodies here in an effort to seal his claim to the throne.

This kitschy tavern is also home to rare early editions of "Treasure Island."

The first public building in Savannah to offer air conditioning was a luxurious cinema that still operates today.

A bizarre roadside attraction and the first instance of miniature golf in the world.

A modest walled graveyard where nobody is actually buried.

Georgia's first brewery is also one of its oldest surviving buildings.

Constant erosion has created a surreal landscape of bleached and preserved fallen trees.

This one-of-a-kind convent boasts a kaleidoscopic exterior of stars and double-headed eagles.

Every equinox this Maya pyramid puts on a spooky ancient light show.