If you love nature as well as beautiful flowers, I would suggest you to go to see flower forest or Siam Tulip forest, in Pha Hin Ngam National Park, which is situated in Chaiyaphum Province, in the northeast of Thailand. This Siam Tulip forest is well-known as one of the most beautiful flower forest of Thailand because it is full of blossom pinkish-purple flowers called, "Siam Tulip" or "Dok Krachiao" in Thai name , which are very beautiful and wonderful.
Rainy season, from June until August, will be the best time to visit this Siam Tulip forest because you will see plenty of blossom flowers spreading all over the area, more than 1,000 rai, in a natural setting. Especially, when the flowers are lightly covered by morning mist, they are very gorgeous. This is very much attracted tourists from around the world to go there. When you stand in the forest that Siam tulips are around you, you will be certainly happy as if you stand in the heaven indeed.
cr. pic. https://th.wikipedia.org/wiki/%E0%B8%AD%E0%B8%B8%E0%B8%97%E0%B8%A2%E0%B8%B2%E0%B8%99%E0%B9%81%E0%B8%AB%E0%B9%88%E0%B8%87%E0%B8%8A%E0%B8%B2%E0%B8%95%E0%B8%B4%E0%B8%9B%E0%B9%88%E0%B8%B2%E0%B8%AB%E0%B8%B4%E0%B8%99%E0%B8%87%E0%B8%B2%E0%B8%A1