Salvation Mountain is a hillside visionary environment created by local resident Leonard Knight (1931–2014) in the California Desert area of Imperial County, north of Calipatria, northeast of Niland, near the Slab City squatter/art commune, and several miles from the Salton Sea.

A visionary environment or fantasy world is a large artistic installation, often on the scale of a building or sculpture parks, intended to express a vision of its creator. The subjective and personal nature of these projects often implies a marginal status for the artists involved, and there is a strong association between visionary environments and outsider art.