Digno de ver, son alucinantes:
http://www.greatervancouverparks.com/HARRISONSandCastles01.html
http://www.maheshwaran.com/index.php/component/option,com_rsgallery2/Itemid,29/catid,9/
Tengo en mi “wishlist” (lista de deseos) de Amazon este libro que lo pillaré para este veranito ;)
http://www.amazon.co.uk/Sandcastles-Made-Simple-Step-Step/dp/1584794089/ref=wl_it_dp?ie=UTF8&coliid=IONERSS670KNF&colid=2ZNJ3JWTQN9NK