A loose boulder in one of Dartmoor's most popular climbing areas is being bolted into place because of concerns it could fall.
The rock, which is about the size of a fridge, is at the Dewerstone, which is owned by the National Trust.
The trust said two options were considered in dealing with the rock: securing it or removing it.
It said it decided to secure the rock after advice that removing could cause some more geological instabilities.
A stainless steel bolt is being drilled through the rock and secured into a crag behind it.
The rock will also have a notice attached warning to climbers not to use it as an anchor point, the trust said.