Luiz Claudio Marigo / Pac de Serra Beach, north of Ilhaus town in the municipality of Urucuca, southeastern Bahia State. August

Juan Manuel Borrero / Italian stone pine wood (Pinus pinea), Sierra Litoral Natural Park, Barcelona, Catalonia, Spain.

Juan Manuel Borrero / Italian stone pine wood (Pinus pinea) Sierra Litoral Natural Park, Barcelona, Catalonia, Spain.

Roger Powell / Sunrise over Lindisfarne Castle, low tide, Holy Island, Northumberland, UK

John Waters / Patterns in sand at low tide, Saunton Sands, Devon, UK.

Jose B. Ruiz / Turbinate monodont snail {Monodonta turbinata} with two Chiton {Chiton olivaceus} Spain.