If you take the path from Rai Leg Beach, it’s a pretty awesome experience! Just watch out for the mozzies!
Popular amongst rock climbers all around the world. This place is known for world class sport climbing along the beach
Raley Beach is a beach close to Ao-Nang (Krabi), you can go there by boat from Ao-Nang and you don't have to pay a lot, like all the things in Thailand, really cheap! It is a lovely place just to chill out at the beach or also to do cool activities like climbing! You can find bars and souvenirs shops as well near the beach! This is the best place to relax and enjoy the beautiful landscape!
Ton Sai is well known among rock climbers to be one of the best places in the world for the sport. There's also cliff jumping (not diving, there's a difference) and places where you can rent kayaks for a day. The only way to get to this beach is by a 5 minute boat ride from the coast of Krabi. There are many places to choose from in the sense of lodging, ranging from highly priced to dirt cheap. Railay is also not too far away if you wanted to lodge there instead. Ton Sai has its few bars and small local vendors along with a small store here and there for misc. needs. Overall, it's an extremely friendly backpacking community.