Everywhere my family has lived has a fish pond installed in the garden. These are usually dug by myself or by the kids and have been a great pleasure for all of us. Most importantly, they provide wildlife with atmosphere and water. Some of our ponds are stocked with fish, tadpoles and frogs. Lying in bed at night listening to frogs is very relaxing.
During the day, especially in summer, water is essential for frequent insects and birds. Providing drinks is more important than providing food because they can always find their own source of nutrition and should not depend on humans.
Bees, butterflies, moths and other insects all benefit from ponds. Keeping them stocked with fish is critical to keeping mosquito populations down. The pump adds interest and keeps it oxygenated.
There are also beautiful aquatic plants that can be grown in and around this feature. If it is a natural spring, some can be placed in pots or planted directly into the bank. However, most ponds are made of plastic, rubber or clay, and planting in these materials is not a good idea.
My ponds are usually built on mounds on the sides, making them appear deeper than they really are. The beautiful water irises bloom in summer and are wonderful. Hebe and other flowering shrubs bring bees and wasps, all of whom drink from the facility.
Another benefit of a garden is the humidity provided by the pond. This allows special plants like ferns to be placed along the edges and even encourages moss to adorn strategically placed rocks.
To me, no garden is complete unless it has at least one water feature in it. At one stage, my garden had about half a dozen ponds scattered around it. Most importantly, they are a great asset to enhance the look of your garden and it would be a shame not to include them.