Cáceres, Spain
Caves seem to be well suited for the low-temperature formation of huntite. For example, it has been reported from the caves of the Carlsbad Caverns National Park, New Mexico (USA); in the Castleguard Cave (Alberta, Canada); in the Grotte de Clamouse, France; in various caves of the Transvaal Province of South Africa; in the Jenolan Caves, Australia; and in the Castañar Cave near Cáceres, Spain.