This small horseshoe-shaped island facing north has a well-sheltered bay in the southerly season. Anchor in about 4-6 metres on a sandy bottom in clear water off the fringing coral reef.
Swim ashore on Koh Sak to a basic seafood restaurant and beach chair vendors. The island used to be an exclusive resort for Thailand’s rich and famous, though it’s now rather rundown. On the footpath leading south from the beach, you’ll see the foot and hand prints of many famous visitors, including Neil Armstrong’s and some old Hollywood legends.