The Crestes de Conill are a very interesting geological formation. Fins of rock, 50m high, that are not much thicker than your car, giving solid, slabby climbing. Conveniently one fin faces due south, the other due north, so you can choose according to the season and time of day which one you climb on. The south face, described here, has the easier routes, nearly all of them of high quality. Oddly there is lot of undeveloped rock to the right and left of the routes here. Not sure if that is because the rock is of a poorer quality, or just because . . .