Ed Jarrett is apparently a master Sand Castle builder. He's just been certified by Guinness as having built the world's largest  sand castle.

It took more than seven weeks to build and Ed had some help. 1500 volunteers. The giant sand castle is on display at Winding Trails in Farmington, Connecticut. It's 37 feet and 10 inches tall.

Below is a time lapse video of it's construction.

More info here