Members of the SubCielo company perform during the fifth annual Puerto Rico Circo Fest in San Juan, Puerto Rico, Saturday, March 10, 2018. The festival is held simultaneously in several spots on the streets of the Old San Juan city on March 10–11. (Photo by Ricardo Arduengo/AFP Photo)

American singer and rapper Ashton Nicole Casey, known professionally as Ashnikko performs on Day 2 of Leeds Festival 2021 at Bramham Park on August 28, 2021 in Leeds, England. (Photo by Matthew Baker/Getty Images)

A pilot demonstrates an aircraft manufactured by US-based LIFT Aircraft in front of Osaka Castle in Osaka on March 14, 2023. (Photo by JIJI Press/AFP Phoot)

If you’re afraid of heights, caves, the dark, suffer from claustrophobia or vertigo, this might not be for you, but if not, a small Welsh town has the perfect subterranean adventure for you: the world’s largest underground trampoline. Just unveiled in Blaenau Ffestiniog, North Wales, Bounce Below is a network of trampolines and slides mounted to the walls of an abandoned slate mine at heights of 20 feet to 180 feet off the ground. Visitors are welcome to climb, bounce, slide, and jump in the netting amidst a technicolor light show.