Where to play water trampoline

Water trampoline can be played on the water or somewhere with flat ground. It can be played on the lake, pond, ocean, swimming pool, grassland, sand land, etc. as long as there is nothing sharp on the surface, otherwise the trampoline will be seriously damaged. And in case of any unnecessary injury, wearing the knee and elbow protector and the helmet would be quite necessary, and in the water, the life jacket should be needed as well, even you can swim, especially when it is on the ocean.