Yes, in some Jain temples (derasars) you may find a well or a sacred tank (kund) nearby. Such water is often considered ritually pure and is used for cleansing rites, pouring on idols, or other purificatory practices in the temple precincts. However, the presence and significance of a holy well vary by local tradition and the particular derasar.

If you have a specific derasar or location in mind, tell me where it is and I’ll share what is traditionally observed there.