Koh Chang Marine National Park is new and virtually unknown to the outside world. Few people know of its secret wonders. Some even boldly call it "the last paradise islands in South-East Asia ". A paradise it is, Koh Chang Marine National Park has been a heaven to the locals who need to replenish their mind and energy, to recharge.

Koh Chang is the largest of the 52-island Marine National Park , all of which are untouched by modernization with their natural resources kept intact. Thus, qualifying the park as a dream escape, a true hideaway, far from the bustling city-life. But in fact, Koh Chang is only 330 kilometers east of Bangkok or approximately 4 hours by road plus another 30 to 45 minutes by boat or ferry. It is surprising even to the Thais that Koh Chang is actually the second largest island in the whole of Thailand , behind Phuket. Despite its size and close proximity to the capital, Koh Chang is least known, undeveloped, untouched, forgotten, and left idle for decades. No doubt, all these are a blessing in disguise.
Koh Chang Marine National Park is a secret retreat yet to be explored. Nearly 75% of the Marine Park is protected by law, under the jurisdiction of the Forestry Department of Thailand. This explains how it remains a virtual virgin wonderland shielded from devastating and vigorous developments. Hence, the lack of infrastructure and population. There are few thoughts of modernization.
The locals as well as their regular patrons are pleased the way it is. So, slow and gentle, tranquil and romantic, Koh Chang Marine National Park continues at its own pace, and still, a paradise for those who appreciate nature at its basics more than the sophisticated luxury of modernity. The coastlines of the Koh Chang Marine National Park is a spectacular work of nature's art and there are beautiful beaches, coves and bays around the islands. Koh Chang Marine National Park is indeed a wonderland of fertile virgin rainforests, un-trekked jungles, high peaks, breathtaking waterfalls, beautiful beaches, spectacular coastlines, colourful coral reefs, clear blue sea of warm waters, idyllic islands, fascinating wildlife and an abundance of healthy marine life. All waiting to be discovered.
The following are some of the best favored islands off the main island of Koh Chang beginning from the north, west and then south of Koh Chang.
KOH CHANG NOI - Laem Chang Noi
Koh Chang Noi is an island off Laem Chang Noi ( Chang Noi Cape ) which is located at the northwestern tip of Koh Chang. The island is comprised mainly of rocks and forest whereas Laem Chang Noi is a cape of purely rocks with no vegetation at all. The beauty of this area lies in the seabed between them where you will find splendid unspoilt virgin coral reefs. Facing the island and cape is the new five-star resort known as the Aiyapura Resort & Spa which has well-appointed rooms with a splendid landscape and superb view.
KOH YUAK, KOH MAN NAI, KOH MAN NOK
Off the west coast of Koh Chang are a small group of islands delightfully visible especially from Klong Prao and Kai Bae beaches. These include Koh Yuak which has a small beachfront of sand formed from decayed corals. The water is clear and shallow qualifying it a good snorkeling spot. From the shores of Klong Prao Resort the islands form a picturesque view especially during sunset. Next to Koh Yuak is Koh Plee and Koh Suwan, both of which have rocky shores. Around the area of Koh Suwan is an unnamed isle which is found to harbor colourful corals about 6 meters deep. Locals call this Koh Rom which means Umbrella Island because of an outstanding beautiful big tree with an umbrella shape. This is a new-found snorkeling site.
Further down south is Koh Man Nai which is directly facing the shores of Kai Bae Beach and very close to the Sea View Resort. The waters between Sea View Resort or Kai Bae Beach and Koh Man Nai is quite shallow. During the low tide when the island bare its lovely sandy beach one can actually walk amid chest-deep waters from the resort to the island. Another island called Koh Man Nok looks as if it's behind Koh Suwan. It is the twin island to Koh Man Nai and is linked together by shallow waters with plentiful of gold-coloured seaweed.
SNORKELING & DIVING

Koh Chang Marine National Park offers some of the most delightful dive & snorkeling sites. The best dive season starts from October / November to April. The best sites are on the west and south of Koh Chang where the abundance of technicoloured, healthy and unspoiled corals and the great diversity of fish are the main draw. Popular sites include the Ao Klong Son, Koh Yuak, Koh Man Nai, Koh Man Nok, Hin Larp, Hin Sam Sao, Hin Look Bard, Hin Run Taek, Koh Rom, Koh Wai, Koh Ngam, Koh Rang, Koh Laoya, Koh Mai Si Lek, Koh Raet, Koh Mak, Koh Kham, Koh Rayang Yai, Koh Kra, Koh Thong Lang, Koh Thian, and Koh Yak.
There are 2 wreck dive sites. The Koh Chang Wreck is a Thai warship sunken by the French Navy. The wreck lies in shallow waters near the Salak Petch Bay , south of Koh Chang. The other wreck that has been making headlines recently is the Pak One Wreck. This was the 900-tonne sunken tanker that was called the Vertical Wreck. Pak One sank after hitting a coral reef in August 1996 on its way to Vietnam . It resurfaced on February 6 this year and drifted bow-upwards into international waters, where it poses a danger to passing ships. The Thai Navy had drained off its 600 tonnes of liquefied petroleum gas and re-sank it between Koh Chang and Koh Samet. It now lies horizontal, in 35-meter deep waters.