The geoglyph once sported a glass bottle eye.

The largest stone circle in the world has ended up bringing up more questions than it has answered.

This strategically placed hill fort has served defensive forces from the Iron Age up until the 20th century.

The granddaddy of English geoglyphs dates back to the late Bronze Age.

This hilarious English intersection is an automotive whirlpool.

The designer of this railway tunnel added a birthday present for himself.

An Iron Age hillfort rooted in Arthurian legend was made famous by musician Peter Gabriel.

This bare, bronze lad in a lone sock sits in the middle of Loughborough’s town center.

The adorable animals return to this nature reserve every fall to give birth to their pups.

A quartet of rusting satellite goliaths are all that remain of a communication network that protected Britain from German and Russian air strikes.

A historic London pub with prison cells in the cellar and a "spy room" on the second floor.

Hear the quietest sound from across the dome.

Eighty million natural history specimens call this gargantuan museum home.

The last moments of the ill-fated Pompeiians, frozen forever in plaster.

This amazingly well-preserved villa just outside Pompeii boasts rare examples of ancient Roman paintings.

Erotic art covers the walls of the largest ancient pleasure palace.

The walls and streets of the ancient city are peppered with penises.

Ancient snack bar of the Roman Empire re-opened.

San Gennaro, the patron saint of Naples, greets pedestrians between these narrow city streets.

This shining multicolored metro station deep under Naples is said to be the most beautiful in Europe.

England's only square-dimension hill horse was built to celebrate Queen Victoria's coronation.

Europe's largest prehistoric mound – burial site of a legendary king?

Besieged by war, this castle ruin has crumbled into a peaceful picnic spot.

This picturesque horseshoe weir was first built in the 1600s to prevent flooding in the town of Bath.