Thailand has gazetted quite a number of marine national parks. On this list are the marine national parks, with those that I have described linked to their individual pages.
Looking for information on Penang? Use this Map of Roads in Penang to zoom in on information about Penang, brought to you road by road.
More information for visiting Bangkok
7-Day Bangkok Family-Friendly Vacation: This is an itinerary for a 7-day family-friendly trip from Penang to Bangkok, with tips on flights, family-friendly hotels, toddler-friendly attractions, shopping highlights and practical travel advice.