By Ricardo Stefani.Mosaic Art.  Cactus perform this mural mosaic technique.

Mural Musaico - Mosaic - Cactus Ricardo Stefani perform this mural mosaic technique

Amazing article on mosaics at a natural history museum in Chile via Killer pics.

I'd love to have this in my yard - cactus, mosaic mural, metro station in Puente Alto, Chile