“ Tham Pha Nang Khoi Cave”
This was an amazing day trip we took in mid November, 2015. From the city of Phrae the drive with 2 people on motorbike was around 30-45min. (37km) The cave is utterly breathtaking and I would tell everyone to visit one day! The cave's walls are backlight with red, blue, green lights and creates a psychedelic experience as you walk the cave. Around 20 min from one end to the other. There is currently a Monk living in the cave, who will have you pick a stick from a jar with a number on it, which he then hands you a paper with a fortune.
From Phrae:
Take the 101 North (going towards NAN)
Stay on this highway for around 20-30km
Once you come into a small town with shops/stores, at the end on the left will be a university....the entrance to the cave road is after on the left (.50km ?)
*If you pass and keep going, the road turns into many turns and curves... you have gone too far, turn around.