Tucked away in the foothill of a mountain in the Kathmandu Valley, Mātā Tirtha defies the description of a sacred tirtha. It is neither situated between the confluences of two rivers nor is it dedicated to the God Viṣṇu, as are most of the tirthas in India. And yet, Mātā Tirtha continues to become popular within the valley among citizens of all faiths. What is unique about Mātā Tirtha? This paper sets out to trace its origins by examining its history, folklore, and the myths that surround the sacred site. Positioned as a tirtha, it is dedicated specifically to the mother—the mothers of all men and women whose mothers have passed away. For that reason, Mātā Tirtha stands out as unique. Nothing similar is to be found in India. In terms of geography, Mātā Tirtha has a unique place in the religious landscape of the Kathmandu Valley, while its historic sanctity dates back to the seventeenth century during the reign of King Pratapa Malla. Legend, however, pushes it back to an even earlier existence. Today, visitors of all religious persuasions come to Mātā Tirtha to honor their mothers who have passed away.