Tham Pha Nang Khoi in Phrae is a hidden gem that will blow your mind with its colorful lights illuminating stunning stalactites and stalagmites. Legend has it that a waiting princess once called this cave home, adding a touch of mystery to your exploration. Get ready for a peaceful adventure through narrow wooden bridges and learn about local folklore as you marvel at giant stalactites, mini waterfalls, and ancient Buddha images. Don't forget your tripod for better photos in the low-light conditions!