I will recommend you to go the north of Thailand, The named Doi Mon Chong is at Chaingmai province. this place is a top 10 of the country Thailand. the beauty of this is that sitting among on the golden prairie and surrounded by mountains,large and small. Also rose for a thousand years that are not easy to look. especially, you can watch one of the most beautiful sunrise and sunset in Thailand.The winter is the peak time for visiting. Have a nice Honeymoon trip.