The beaches are the main reason to visit Railay, but it's also a rock-climbing hotspot. Railay's karst peaks draw adventurers both experienced and novice to try their hand at climbing the towering limestone cliffs. Among the many other active things to do, you can go elephant trekking, whitewater rafting, kayaking, and snorkeling, or take on some lighter options such as cooking classes and indulging in a massage. There's also the tourist-friendly Diamond Cave, with a convenient walkway to accommodate curious visitors looking to do some exploring between stretches of sunbathing.