It's already home to the world's longest zip-wire, now Blaenau Ffestiniog boasts what is believed to be the world's largest underground trampoline in the abandoned Llechwedd slate quarry.
Welcome to Unexplained Mysteries! Please sign in or create an account to start posting and to access a host of extra features.
World's largest underground trampolineblaenau ffestiniog underground trampoline llechwedd slate quarry longest zip-wire
No replies to this topic
0 user(s) are reading this topic
0 members, 0 guests, 0 anonymous users