Lake Sonfon, also called Lake Confon, sits in the hills of the Sula Mountains at 549 meters above sea level, in the chiefdom of Diang. The nearest towns are Kabala, 60 kilometers to the north, and Bendugu, 40 kilometers to the south, distances that keep the lake remote and little visited. Seven small streams feed it, and it drains from its southern end, where the waters gather and become the head of the Pampana River. The lake breathes with the seasons: its level swings dramatically through the year, and in the dry season the surface vanishes almost entirely beneath a blanket of vegetation, an annual disappearing act that has long fed its mystique.

To the people of Diang, Sonfon is holy ground. It is woven into traditional belief, and ceremonies are carried out along its shore, where calabashes bearing rice and food are floated onto the water as offerings. In local tradition a powerful djinn inhabits the lake, and the water's own seasonal vanishing and return only deepens its reputation as a living, willful place. This is sacred geography in the fullest sense: not a backdrop to belief but a participant in it, a lake that gives and withholds, that must be approached with respect and addressed with gifts. For generations, the relationship between the community and the water has been one of reverence rather than ownership.

Sonfon is a place of striking biodiversity, recognized as a key conservation area and long proposed as a protected area, though as of 2011 no formal protection was in place. Even without thorough surveying, researchers have identified 105 species of birds here, among them the iris glossy-starling, the splendid sunbird, Dybowski's twinspot, the red-faced pytilia, and the pied-winged swallow. The mammals are rarer still: the endangered pygmy hippopotamus moves through the surrounding wetlands, alongside the black duiker and Maxwell's duiker, small forest antelopes that slip through the undergrowth. It is the kind of richness that should command a reserve, and yet the lake's defenses remain, for now, only the customs of the people who hold it sacred.

There is gold at Lake Sonfon, locked in its rocks and scattered through the alluvial deposits washed down around it. Only the alluvial gold is worked, but it is worked hard: an estimated 15,000 miners labor around the lake, drawn by a livelihood the region badly needs. The cost is the lake itself. Because the mining depends on water, it is steadily drawing the level down, and the sacred lake is shrinking. Here is the bind that defines so much of Sierra Leone's interior: a place revered for centuries and rich in life, set against the immediate, desperate value of the gold beneath it. The calabashes still float out across Sonfon's surface. The question is how much longer that surface will be there to receive them.