Phu Dan Hai is a sacred cultural and geological site located in Kalasin, renowned for its intricately carved Buddhist rock images and depictions of nagas, whose name reflects the site's topography and cultural symbolism.

Phu means ‘hill’, dan refers to a ‘rocky plateau’, and hai means ‘earthenware jar’, referring to the landscape, shaped by centuries of natural erosion, that features pot hole-like formations that resemble large jars.