Ko Ngai (also spelt Koh Hai) is a tiny island in Krabi province close to Koh Lanta. It is only measuring 4 kilometres long and 2 kilometres wide. Officially it is part of Ko Lanta National Park. The easiest way to reach the island is taking a boat from Pak Meng Pier in Trang but it is also possible to go by ferry from Koh Lanta. Together with the Neighbouring islands Ko Muk and Ko Kradan they form a triangle. That makes it easy to hop from one to the other.