Zip World Caverns Zip line is an incredible, heart racing adventure! Zip across the underground slate caverns of Zip World Caverns Zip line is an incredible, heart racing adventure! Zip across the underground caverns, walk across a tightrope, and climb deep into the caverns.

With 13 zips and fun obstacles, the caverns zip line will keep you entertained for hours! Walk across nets, logs a tightrope, and climb deep into the caverns of Blaenau Ffestioniog in Eryri (Snowdonia National Park.) With 13 zips and fun obstacles, the caverns zip line will keep you entertained for hours! My experience was a little under 2 1/2 hours, although if you're at the back of the line it'll take longer. Starting off there is a training course with small zips to get you comfortable clipping onto the course. Once you've completed the training, you move on to the main course which is self guided. You are connected to the course at all times until the last zip where you disconnect. Overall the Caverns Zip line is a fantastic way to spend time with family, especially during a wet day in Wales as the caverns are located underground and out of the harsh elements.

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