09 Mar 12-second stile

stile – noun [‘stahyl] a structure that allows people to pass over a wall or fence but remains a barrier to sheep or cattle.

From Creatividad con sencillez (creativity with simplicity). H/T: Silas.

[UPDATE] I assume this clever device is located somewhere in South America, possibly Chile or Peru. Contrarian’s engineer friend points out it might not work so well in winter. Especially this winter. Especially in Halifax.