We skipped all the boulders and stone waterfalls, free form attempts to look like a natural water feature. Our view was we were building a swimming pool, with no attempt to disguise it as some kind of natural pond. Besides we felt that the free form designs were a bit overdone and preferred the return to the classic clean geometric designs. It's interesting how design trends all seem to have their day, and now some 40 or 50 year old designs can look more "modern" that ones from 5 or 10 years ago.