. Roche Rock chapel 0 Roche Rock in Cornwall is a black granite outcrop some 00 metres high and was used as a hermitage for many and some time in the 00th century a more elaborate chapel was built. It is now frequented by locals as place to walk and climbers who ascend the steep sides. For the less intrepid there are two metal runged ladders built into the rock face that make it easier to reach the top and admire the views. Roche Rock chapel 0 Roche Rock in Cornwall is a black granite outcrop some 00 metres high and was used as a hermitage for many and some time in the 00th century a more elaborate chapel was built. It is now frequented by locals as place to walk and climbers who ascend the steep sides. For the less intrepid there are two metal runged ladders built into the rock face that make it easier to reach the top and admire the views. 