Lots of people have old, rusting bathtubs in their sheds or garages that they keep planning to do something with them. If you don't already have one, they are widely available cheaply at flea markets, garage sales and swap meets. Turning an old bathtub into a fountain is relatively easy as it already has hole or faucets through which you can run water. Also, you can scrub it down and clean it up or leave it as it is for a rustic look. Perfect for country homes or farms, a bathtub fountain can also serve as a goldfish pond or birdbath.
Goldfish or decorative ponds are bland and require maintenance. By putting a fountain in one, it becomes an attraction and the constantly moving water cuts back on scum and algae prevention. A simple upward-spraying fountain from under the water can work, or rock piles can be turned into springlike fountains trickling into the pond.
Taking a regular birdbath into a fountain keeps it clean and invites birds to clean themselves. As long as the fountain is not high-powered, birds will land, drink and play in it. The fountain will keep the birdbath filled with fresh, clean water and will prevent the bowl from getting dirty or stained as birds use it. Birdbath fountains are ideal for smaller yards.
If you have a garden, outdoor or retaining wall, you can turn it into a fountain. You can place rock beds along the edge of the wall and have water drizzling from a statue or simply flowing slowly down a trough. Placing a small, above-ground pond next to a wall is a way to eliminate dead space and make the fountain look better while creating an additional water feature for your yard.