Koh Si Chang Picturesque island with relaxed atmosphere & lovely beaches Koh Si Chang is a small picturesque island in the Gulf of Thailand. With its relaxed atmosphere and slow pace of life, the island is a haven of tranquility not far from the hustle and bustle of Pattaya and Bangkok. Among its draws are the beaches with clear waters, beautiful sunsets and outdoor activities as snorkeling, biking and kayaking. The island’s restaurants always have a steady supply of fresh seafood like crab, squid and prawn. Koh Si Chang’s only town on the North East tip of the island is lined with narrow lanes and small colorful houses. As private cars are not allowed on the island, traffic is very light.