If your trip to Rai Som is all organized but your itinerary is a little on the empty side, we can give you a few hints and tips.Close to the center, Phra Nakhon Khiri Historical Park is one spot you might like to consider putting on your must-see list. If you still have some space on your schedule, Tham Khao Luang Cave and Wat Mahathat Worawihan will keep you on the go too.