I have a store bought water fountain in the center of my garden and I find it quite soothing. The house that I will be working at tomorrow has a reel cool water feature in their Japanese garden. It starts with a rapids section about 10 feet long then a waterfall that empties into a pond the drop is about 5 feet so it's pretty impressive. They had me put $1.000 worth of plants and shrubs in the Japanese garden this year so I can't wait until they turn the waterfall on and see all the plants growing and blooming. Cheers!