Pondless waterfalls are the second easiest water feature to own, because there is very little maintenance, They are also the second least expensive water feature you can build, because there is no pond.
Pondless waterfalls have a gravel floor that allows the water to drain back into an underground pit, where the recirculation pump sends the water back to the top of the waterfall again.
Pondless waterfalls can run all year long. Pondless waterfalls often have lights used to accent features of the Pondless waterfall.
You may have to add water over the winter depending on the size of the pump pit, because ice will form on rock edges and splash zones, using more water than usual.