Along the banks of the Ganges in West Bengal, a temple built in 1954 surrendered to the river it once overlooked, its foundations undone by erosion that overwhelmed every barrier placed in its defense. The collapse is both a local grief and a wider warning — that the sacred and the historic are not exempt from the slow, accelerating work of environmental change. As India's holiest river reshapes its own banks, a civilization built along its edge is being asked how much it can hold, and how much it must let go.