Wat Amarin Khuha is a small temple located in an isolated area in tambon Ban Mung, some 8 kms south of Noen Maprang. As with other temples in the district there are limestone cliffs and caves nearby. Tham Muang means 'purple cave'. In April 2018 a number of beautifully decorated long boats lay here suggesting they may have been part of the Songkran Festival just past.