This is a series of geometric sandcastles built by sculptor Calvin Seibert (links to his Flickr with a ton more high-res shots) on the beaches of Hawaii. They are most impressive. You know, I built a sandcastle once when I was in Florida on vacation with my family. I remember a balloon washed into my castle's moat so I poked it on the end of a stick and made it my castle's flag. When my parents saw it they made us pack up our stuff and leave the beach. I never understood why until years later when I saw my first condom. Well, technically my second one.
Keep going for seven more.
Thanks to Joseph, who agrees the best thing about building sandcastles is recruiting little crabs to help guard the towers.