Koh Phi Phi Lai (also known as Ko Phi Phi Leh) is the smaller island to the south popularised when parts of the movie "The Beach" were filmed there although it's uninhabited apart from bird nest harvesters and a few Maya Bay wardens, expect plenty of tourists. More info about Koh Phi Phi
Hin Muang and Hin Daeng are considered ones of the best places in Thailand to spot the gentle giants of the ocean, Whale Sharks. However, please do not disregard Ko Lanta's other top of the line dive sites including,
Ko Ha with its great wall dives and exciting caves offers unforgettable memories. For some reason it almost always offers amazing dive conditions, with underwater-visibility on average exceeding 20 meters.
Ngai Island A fine sandy beach and coral reefs rundown the east side of this island. It is wonderful for diving.
Ko Rok The twin limestone islands 30 kms south of Ko Lanta Yai are named Ko Rok Nok and Ko Rok Nai with only 100 meters between them. There are almost no people living on Ko Rok, only the Marine Park Rangers reside here, leaving the islands to remain unspoiled. Ko Rok Nok has some beautiful beaches to offer.
Ao Man Sai Beach in particular is ranked in the top ten most beautiful beaches in Thailand. This long beach has real white powder sands and crystal clear waters, with a fairly shallow tide rich with fabulous corals offshore.
Just a few steps walk into the forest enables you to see a jungle of huge banyan trees, about 6 meters wide, which gives the beach its name. A little further into trees brings you to another beach named Ao Tha Lu. The sands here are shaped like a horseshoe and surrounded by black limestone cliffs.