Samaesarn Island is one of the nine islands under the Plant Genetic Conservation Project initiated by HRH Princess Maha Chakri Sirindhorn and is under the strict supervision of the Royal Thai Navy. The primary mission is to maintain the integrity of natural resources both on land and under the sea. Consequently, no overnight stays are permitted on the island to minimize environmental impact and keep the surroundings as close to their natural state as possible, ensuring that visitors in 2026 still experience the same pristine beauty found decades ago.

The surrounding area of Koh Samae San is distinguished by crystal-clear turquoise waters and exceptionally rich biodiversity, including living coral reefs and various marine species. These are considered rare natural resources for a tourist destination located just a few hours from Bangkok. The tourism management here is unique due to its systematic eco-friendly administration, featuring a strict daily limit on visitor numbers and expert naval officers who ensure order and safety at all times to minimize environmental impact and sustain the ecological balance for the future.

There are two primary beaches on the island open for relaxation: Hat Thien and Hat Luk Lom. Hat Luk Lom, in particular, is like a traveler's paradise with its fine, soft white sand contrasting with the turquoise sea. The atmosphere is quiet and peaceful, free from motorized watercraft such as jet skis or banana boats, leaving only the sounds of the waves and the sea breeze. Beyond the beauty of the beaches, this island is a Living Nature Classroom, featuring well-maintained educational trails for studying mangroves and local plant species, suitable for visitors of all ages who wish to explore nature in depth.

The must-visit highlight activity is Snorkeling to observe staghorn corals, mound corals, and colorful schools of tropical fish, with officers providing close guidance for safety and to prevent damage to the corals. For families or those who prefer not to enter the water, there are activities such as Kayaking and Glass-bottom Boat Tours to view the underwater world, allowing an intimate look at the wonders of the sea. Koh Samae San is therefore more than just a place for relaxation; it is an exemplary model of tourism that instills a sense of respect and love for nature in its visitors.

Currently, Koh Samae San continues to win the hearts of nature photographers, couples, and families seeking peace and meaningful relaxation. With photography spots from the hilltop viewpoint overlooking a panoramic vista of the island and the clarity of the water reflecting the sunlight in a shimmering glitter, every detail of this island is preserved as a natural heritage that passes on a lasting impression to every visitor

• Private Car: Drive toward Sattahip to the Thai Island and Sea Natural History Museum (Khao Ma Cho) to park and purchase boat tickets.

• Public Transport: Take a van from Bangkok to Sattahip (KM.10 or Market), then take a local taxi to the Khao Ma Cho pier.

• Best Season: November to May offers the calmest and clearest waters for snorkeling.

• Dress Code: As it is a military-managed conservation area, polite swimwear is required (no bikinis). Alcohol is strictly prohibited.

• Essential Items: Use Reef Safe sunscreen to protect the corals and carry back all personal trash to the mainland.

• Safety: Strictly follow the naval officers' instructions. Never touch or step on the coral reefs while snorkeling.

• Booking: In 2026, online pre-booking is highly recommended due to the strict daily visitor quota

Admission Fee:

• Local Visitors: Adult 300 THB, Child 220 THB.

• Foreign Visitors: Adult 600 THB, Child 440 THB.

• Note: Foreigners must be accompanied by a Thai national or comply with naval security protocols

Opening Hours:

• Open Daily: 09:00 – 16:00.

• First boat departs at 09:00; last boat returns at 16:00