Ko Samea San is an island in Amphur Sattahip, Chon Buri. Getting there doesn't take a very long time because the island is not too far from Bangkok. Ko Samae San is under the control of the Royal Thai Navy. Visitors can only have a one-day trip but cannot stay overnight. However, they can stay at the resorts near the pier. Ko Samae San is one of nine islands in the Plant Genetic Conservation Project under the Royal Initiative of Her Royal Highness Princess Maha Chakri Sirindhorn with the objectives of promoting the island as a place for learning and conservative traveling. Visitors can go snorkeling, riding on a glass-bottom boat, kayaking and biking around the island. There are facilities provided such as snorkel sets, life jackets, bathrooms, showers, and restaurants.

Ko Kham is a small island located on the west of Ko Samaesarn. It is an island with abundant natural resources and beautiful beach. This island, popular with ecotourists. is maintained by the Royal Thai Navy at Satthahip and only open to visitors for day trips. Ko Kham is actually a pair of islands joined by a thin strip of land and the beaches are secluded and spotless. The island is covered by clumps of Chan trees and visitors can walk the natural trails across the island before donning a mask and snorkeling in the clear waters or taking a memorable trip in a glass-bottomed boat.