Sant Cugat del Vallès | Mollet del Vallès | Valles del Tuy | Jules Vallès | De Los Valles y Volcanes | Vallès Occidental | Valles Caldera | Vallès | Interandean Valles | Interandean valles |
In early 2005, Mars Express, a European Space Agency orbiter, discovered evidence of kieserite in patches of Valles Marineris (the largest canyon on Mars), along with gypsum and polyhydrated sulfates.