Mae On cave is reached by turning off to the left about 1km before the left-side hot springs turnoff. As far as caves go, this cavernous interior is certainly worth the 300+ stairs that need to be ascended to enter the cave, followed by a similar descent through some claustrophobic gaps. You soon find yourself at the bottom of an enormous chamber with a natural chedi formed from a stalactite. It’s been converted into a religious site with several consecrated Buddhas.