Discover an exciting subterranean playground deep in the heart of the welsh countryside with this incredible bounce below experience hidden underground in a 176 year old disused cavern that is twice the size of st pauls cathedral bounce below is home to huge trampoline like nets spanning two vast chambers all linked by walkways and slides youll enjoy a truly unique thrill as you bounce and climb in the belly of this majestic cavern which is covered with technicoloured lights that only enh