I will recommend you to go the north of Thailand. The name 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. Especially, rose for a thousand years that are not easy to find. Moreover, you can watch one of the most beautiful sunrise and sunset in thailand. the winter is the peak time for visiting. Have a nice time to honeymoon trip.