Bubbling fountains are particularly well suited to cool and temperate climates. The sound is cheerful and, unlike spray fountains, does not remind one of rain.
Bubble fountains also work well with circular pools, globes, stones and ponds - because the pattern of the ripples is also circular.
The comments made on circular pools also apply:
As shown in the photographs, water can be allowed to trickle down the outside of the container, collected in a tank and pumped back through the center. The pump can be solar powerd