Walls

This wall on a street corner in Lower Manhattan has been a blank canvas for a rotation of renowned artists since the 1980s.

No one knows the origins of the mysterious stone ruins discovered on a hillside in Halifax.

This fortified sand barrier dividing a contested territory is the longest minefield in the world.

A strange rock formation with numerous legends trying to explain it.

Descend 2,030 years into the past in an ancient tunnel built to support Jerusalem's most famous wall.

Mortarless walls that stretch for miles are a lovely solution for creating grazing land in the harsh terrain of the Aran Islands.

A painted-over wall in Detroit originally built to segregate a black community from an adjacent white development.

Thanks to the building of a life-giving reservoir, part of the Great Wall of China is now a dive site.

This imposing tower named after the mythical sword of King Arthur is considered the tallest freestanding climbing wall in the world.

Countless grotesque faces stare out from this eerie Prague art wall.

These historic defenses ensured the city within would survive hundreds of years of occupations, sieges, and invasions.

This outdoor gallery of graffiti-covered walls pays homage to the past, present, and possible future of street art.

The highest peak in Northern Ireland is topped with a stone tower and haunting burial mounds.

Building this tragically pointless stone barrier cost the lives of the prisoners made to build it.