Full-day guided tour with limestone karsts, James Bond Island views and sea-canoe exploration of caves and lagoons; tours usually depart 7:00–8:00am and return ~5:00pm — book a reputable operator and bring swimwear.
Short boat trip from Ao Nang (boats run ~8:00am–5:00pm) to Railay West/East and Phra Nang Cave for swimming, caves and beach time; ideal for photography and short hikes.
Railay is famous for limestone climbing; take a 2-hour taster session with a certified guide or relax on the beach; climbing typically available 9:00am–4:00pm.
Visit the turquoise Emerald Pool and relax at nearby hot springs in the national park—sites open ~7:00am–5:00pm; excellent for swimming and nature walks.
A relaxed morning walk on Nopparat Thara beach or visit Krabi Town markets for souvenirs—markets generally open early (6:00am+) and are busiest in the morning.