Drystane dyke

A drystane dyke or dry dyke is a waw that is biggit frae stanes athoot ony lime tae bind thaim thegither. As wi ither dry stane structures, the dyke is hauden up bi the interlockin o the stanes. Sic waws are uised in biggin construction, as field boonds, an on stey braes as retainin waws for terracin.

Seiventeent century drystane dyke at Muchalls Castle, Scotland
Inca waw o drystane biggin in Cusco, Peru