Board a spacious boat for Angthong Marine Park on this full-day tour from Koh Samui. Explore the turquoise waters in the Gulf of Thailand with plenty of snorkeling opportunities. Ride a longtail boat to Mae Koh Island, or upgrade to kayak along the coastline. Hike to the summit for fantastic views of Emerald Lake, then continue on to the white-sand beach of Wua Talap Island, which features Lotus Cave. You’re served a light breakfast and Thai lunch by the professional crew on board.