The longest fence in the world stretches over 3,000 miles to keep the dingoes out.

This eccentric cave dwelling is bizarre even by the standards of a subterranean town.

An opal mining town in the middle of Australia where people live, worship, and shop underground.

Rusted cars, trucks, and buses form a fascinating collection of Soviet-era machinery.

Disused seaplane hangar gets a second life as the jaw-dropping home of Estonia's museum of maritime history.

An empty relic of the Moscow Olympics crumbles away in Estonia's capital.

The longest and tallest aqueduct in Britain can actually be sailed across.

Created as a punny statement about genetic engineering this monstrous hybrid statue has become a beloved icon.

The tower was originally used as a chimney for the waste incinerator of St Johns Precinct and Market.

Each year a new straw behemoth is born.

Once the last route taken by condemned prisoners.

The western face was supposedly left clock-less to snub the Welsh.

Mysteriously stacked storefront paths give this medieval British town an iconic style like none other.

A 168-foot tower, part of the abandoned Chester Leadworks facility.

A rare wooden coffin set vertically into the Gothic arch of an ruined church.

Western Europe's only representation of a Roman goddess still in its original location sits in an unassuming park.