If you are planning to visit Thailand I highly recommend going to waterfalls, mountains, Wats (temples), markets and cooking classes.
One thing many tourists want to do when traveling in Thailand is to ride elephants and pet tigers. However, most of the elephant camps are not very ethical and do not give the elephants the treatment the need. There are some “no ride” camps where you can hang out with the Elephants in a way many feel to be less exploitive. The tiger camps drug the tigers constantly so they don’t maul you. So please keep this in mind when booking your trip and activities.