I briefly mentioned that I was at a bachelor party over the weekend for my friend Adam. On the 2nd day of the party, we went ATV'ing on the sand dunes at Pismo Beach, which, was pretty amazing. I thought we would just be riding around on the shorline, but these dunes went on for miles, and the hills were pretty amazing.
To give you an idea of how big it was (courtesy of Tim):
And here's a video clip, courtesy of Tim, as well:
I can't wait to go and do it again!