Boulder Adventures, Llanberis offers outdoor activities and accommodation in Snowdonia, North Wales.
Picturesque site of former 'holy well' dedicated to the sixth-century saint, Cybi. Two stone well-chambers and a later cottage survive.
Probably built by Llywelyn ab Iorwerth ('the Great') early in the thirteenth century, the castle is dominated by a massive round-towered keep, still standing up to 50 feet (15.2m) high.
Please note that Electric Mountain is temporarily closed for refurbishment and upgrading. We hope to be back in the new and improved Visitor Centre by 2020.