South African calligrapher Andrew van der Merwe has developed various wedge- and scoop-shaped tools to allow him to carve letters out of beach sand. This is a picture of one of his creations, on a beach in Belgium. 
image from “Beach Calligraphy,” by Andrew van der Merwe, Japan Letter Arts Forum, 21 October 2008 :: via The Ministry of Type
Sep 8, 2009, updated Mar 31, 2025