Angthong National Marine Park | Highsea Tour Official Day Trip to Angthong National Park by Big Boat Highsea Tour, Explore Angthong National Marine Park with Highsea Tour. Enjoy a fun day trip by big boat with kayaking, snorkeling, sightseeing, buffet lunch and roundtrip transfer. Book online today. For more information about Angthong National Marine Park visit https://www.angthongnationalpark.com