The Koh Larn group of islands is comprised of Koh Larn, Koh Krok, Koh Sak the largest being Koh Larn. There are beautiful beaches, clear water and an abundance of coral. Visitors can view the coral either from a glass-bottom boat or by diving down directly. Also a well-known beach is Ta Waen Beach located in the northern part of the island, a 750 meters stretch of white sand with many stalls and shops. Sightseeing boats mostly dock in this area. There are also Laemtien Beach and Samae Beach on the south-western side, each beach spanning a length of 700 and 100 meters respectively.

Both are regarded as beautiful and interesting spots, especially Laemtien Beach which has remained exceptionally clean and tranquil. There are now a few stores servicing visitors. Ta Pan Beach on the western part of the island is 500 meters in length with make-shift holding available. On Saturdays, Sundays and Holidays, sightseeing boats usually dock along this beach all the way to Laemtien where there is coral. On the southern part is Nual Beach  which is 450 meters in length. On this beach is a hotel which accommodates a large number of tourists. This is another good place for viewing coral. Popular activities on Koh Larn include swimming, coral viewing, para sailing, water scooter etc.