pretty amazing but gotta suck when the tide comes in!

i've heard of contemporary art, this is just temporary art!

Speaking of temporary art, check out Tibetan Buddhist sand mandalas. Here is a link to the Kalachakra in wikipedia - scroll down and click the link that takes you to a time-lapse video of creating one (it takes days and days and days).
Amazing.

http://en.wikipedia.org/wiki/Sand_mandala

Wow...This brings raking the beach to a whole new level....