Thailand's Hidden Secret Koh Chang has always been a favourite get-away for Thai people. Lush and mountainous, this quiet island, full of natural treasures, is a jewel just waiting to be discovered. Only 360 kilometres from Bangkok, Koh Chang is an island paradise with pristine forests and rich marine life. The largest of 47 islands off the coast of Trat province, its seeming inaccessibility means that the island has been largely overlooked by visitors, making it a true island get- away. However, an excellent road from Bangkok and a short flight from Bangkok to Trat airport, have meant that the destination is now starting to get the attention that it deserves.