My apartment in Chatham, NJ was right next to the Passaic River in Morris County.  I could literally walk off the parking lot and down to the water.  I took a lot of photographs of that stretch, including this heap of rock.

It was one of those moments of "Oh - hey!" when the idea of the image popped into mind, and I remembered that these rocks were right out there, waiting for me to shoot.  Pulling on some crappy clothes, I slogged around in the river for twenty minutes or so snapping pictures. 

And no, the rocks are not anywhere so large as they appear in the finished image; the big one is only a couple feet square-ish - if you can refer to a water-rounded rock as anything close to square.

HA

Yes, that's the same barrel Rachel is sitting on in the Riverside Locations advert

(see Ad Ventures and scroll down).