Sunken trampoline in landscaping, surrounded by mulch. Mulch is supposed to be a safer landing surface, since it has more give than grass on dirt in case the kids over-jump. It also blends into the garden area better.
19 of the world's coolest playgrounds designed by top architects
Bounce Below is a set of three giant trampolines nestled inside the Llechwedd Slate Caverns — a former Victorian Slate mine in Blaenau Ffestiniog, North Wales. Created by Zip World, a company specializing in adventure activities, the subterranean wonderland is a playground for kids and adults.