It's very convenient to go to sea from Sumei Island to take part in the tour of marine parks. It happened that our accommodation was near the island pier. We arrived at the pier early in the morning to buy tickets and boarded the ship. Antong National Ocean Park is located to the north of Sumei Island, about 3 hours by boat. This is a small uninhabited archipelago in the Gulf of Thailand, which has been eroded by sea waves for many years. The bottom of the island has formed a variety of caves. One of the islands even has a peculiar view of Lake in the sea. There is a large lake on the island. The green vegetation formed naturally on the island is rich and colorful. A group of sea birds sometimes skim the blue sky and stand at the top of the island while the sea breeze blows. A comfort is indescribable. In a relatively shallow part of the ocean, you can also participate in rowing activities, two people in a group. Guests who do not participate in rowing can take part in the planing. When they go to the bottom of the sea to see the fish, the bottom of the island is 2 or 3 meters deep, but they are still a little scared to wear breathing apparatus. The reefs and fish on the bottom of the sea are clearly visible, which is an eye-opener. This is free of charge. On the way back, we first took everyone into the dolphin area to watch. A large group of dolphins jumped over Shanghai from time to time. It was very spectacular. Then we drove along the forest of the sea archipelago. A dense sea forest was incredible. It was above the sea!