Nepal, Feb. 2 -- On full-moon nights in October and the Nepali New Year in April, hundreds gather to worship at the sacred pond of Mai Pokhari in Ilam. According to legend, the pond was born thousands of years ago from the union of the holy Mai and Tamur rivers in eastern Nepal.

Another story tells of an elderly couple whose death gave rise to a life-giving pond meant to quench human thirst. The nine corners of the pond are each believed to house a goddess capable of granting health, fertility, good harvests, and protection from landslides and storms.

In every version, one message is constant: when people polluted the water, the goddess moved away. Fear of losing her protection still shapes how people treat the sacred water body today....