Officially part of Ko Lanta National Park, Ko Ngai (also spelt Hai) is easily reached during high season from Ko Lanta itself, the mainland via Trang province and several other islands. Neighbouring Ko Muk and Ko Kradanjoin Ngai to form a triangle that makes it easy to hop from one to the next. Dotted in between, the rocky isles of Ko Maa, Ko Chueak and Ko Waen conceal some great snorkelling sites that can be reached by kayak or longtail.