Explore Koh Larn with The Thailand Forum.br Koh Larn also known as Coral Island is just a 40 minute 20baht boat ride away from Bali Hai Pier in Pattaya.br Beaches on Koh Larn include Thonglang Beach Hat Ta Yai, Ta Waen Beach, Sangwan Beach, Thien Beach, Samae Beach and Nual Beach.