Rock Climbing is likely to be an ideal attraction of Krabi by popularity of Railay. By this photo, a trainer of rock climbing is showing. Limestone cliffs on Railay East are plenty for rock climbers. I would recommend Cliffs Man on Railay West. Check it first if you like. ....Map is available

Cliffs between Tonsai and Railay beaches are very interesting. It's suitable for a novice like me.