The Go Below Ultimate Xtreme route runs long and deep under the mountains of North Wales. A staggering five kilometres of pure underground adrenaline through some of the world’s most spectacular abandoned mine workings. The route has nine underground zip lines, and they all run high off the ground through vast caverns deep below the surface, exceeding 1,300 feet down in some places. There is no publicly accessible place in UK deeper than this. At one point you are stood at the top of a 70 foot abyss, with the route continuing on from the bottom. You can abseil down if you like or you can use the free falling machine and just jump.
Cost: £89 registration fee, £250 minimum sponsorship target