Koh Lanta Yai is 6km wide and over 30km long, located approximately 70km from Krabi Town. The island has 9 attractive white sandy beaches, splendid scenery; coastlines have more than 70 small islands and plenty with forest, coral reefs and under water life. The geography of the island is typically mangroves; coral rimmed beaches; and rugged tree covered hills.
A paved road runs along the beaches all the way from the northern part of the island to the headquarters of the Mu Koh Lanta National Park in the south. The landscape is dominated by a series of mountains covered with virgin rainforest. To the east features an old community.
Koh Lanta Yai played a significant role as a safe-haven for traders from Malaysia, Singapore and Indonesia. Originally, Lanta Old Town (formerly known as Si -
Raya)on the east coast, acted as the port and commercial center for the island and provided safe harbor for Arabic and Chinese trading vessels sailing between the larger ports of Phuket, Penang and Singapore.
Today, Old Town is a small sleepy village with 100 year-old shacks and shop-houses built on stilts over the water. Baan Saladan on the northern tip of the island is now the business and commercial center where most visitors arrive on the island.
Weather in the region is tropical - there are only two seasons: the hot season from January to April, and the rainy season from May to December. Temperatures during the year average 25ºC to 32ºC (77ºF to 89.6ºF) and the yearly rainfall averages 2568.5mm.