I have to admit, I like the river rock look around a pond. River rock always looks more natural than flag stone or that busted up retainer wall type of rock. I live here in the Northwest where we have many mountain streams and rivers. I like to use use my imagination when I look at someones pond, and wonder to myself, what could they have done in their pre-planning stage to incorporate big & small river rock like I see around here in the Cascade Mountain? My pond is small, but I have come up with a bit of another look using oblong river rocks standing on end around my pond, and arranged to create some kind of balance along with the wooley thyme, and irish moss.
I managed to pick up most of my more interesting river rock down in Oregon at the Molalla River near my youngest sons home.