The storied landscapes of Ireland are dotted with holy wells—hallowed springs, pools, ponds, and lakes credited with curative powers and often associated with Catholic and indigenous saints. While many of these sites have been recently lost to development, others are visited daily for devotions and remain the focus of annual community gatherings. Encouraging both their use and protection, Holy Wells of Ireland delves into these irreplaceable resources of spiritual, archaeological, and historical significance. Reserves of localized spiritual practices, holy wells are also ecosystems in themselves and provide habitats for rare and culturally meaningful flora and fauna. The shift toward a "post-Catholic" Ireland has prompted renewed interest in holy wells as popular domains with organic faith traditions. Of the roughly 3,000 holy wells documented across Ireland, some attract international pilgrims and others are stewarded by a single family. Featuring 140 color images, this remarkable volume shares the transdisciplinary work of contributors who study these wells through the overlapping lenses of anthropology, archaeology, art history, biomedicine, folklore, geography, history, and hydrology. Braiding community perspectives with those of scholars across academia, Holy Wells of Ireland considers Irish holy wells as a resilient feature of ever-evolving Irish Christianity, as inspiration to other faith traditions, as places of pilgrimage and healing, and as threatened biocultural resources.