The enormous earthwork sculpture honors the ponies that lived and worked in the old colliery.

The world's largest prehistoric copper mine had 30,000 animal bones scattered throughout the maze of passageways.

This lonely cast-iron structure is the only wave-washed lighthouse of its kind left in all of Britain.

The stately remains of Llywelyn the Great's mighty fortress.

A hermit's tiny cell built into the cliffside that saved him in South Pembrokeshire.

The decaying ruins of Wales' first asylum for the mentally ill.

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

A submerged archeological park still holds the wonders of a Roman Sodom.

Sitting beneath an unremarkable residential building is a museum devoted to classic Pinball.

This tiny islet has somehow housed an ancient temple, two monasteries, a church, a fortress, and a restaurant.

A tree that defies gravity grows in an ancient ruin.

The glowing blue Nymphaeum of Emperor Tiberius.

The Emperor Tiberius' palace of debauchery.

Beautiful views and Roman-style statues on the Italian coast.

Climb the dead electric pylons of Messina.

A volcanic old faithful, Stromboli has been erupting continuously for the last 2000 years.

A petite white lighthouse perched on the ancient core of Stromboli Volcano.

A single column facing the sea is all that's left of one of the most important temples of Magna Graecia.

The oldest scientifically dated tree in Europe lives on a remote cliff.

An Italian hillside ghost town.

The steel cable lets adventurers zoom between two mountain towns at speeds of up to 75 miles per hour.

Crossing this suspension bridge feels like walking through the sky, a fitting tribute to the head of the Apollo program.

Dramatic sea stacks adorn the coast of this small village on the Adriatic coast.

One man's quest to fix his toilet unearthed over 5,000 artifacts spanning more than 2,000 years of history.