The rim of Gusev Crater - Sol 91 (1)

Caption NASA originale:"Spirit took this PanCam image on Sol 91 (April 5, 2004). Spirit is looking to the SouthEast and through the martian haze has captured the rim of Gusev crater, approximately 80 Km (such as 49,7 miles) away on the horizon.
The right side of this image reveals the portion of the crater edge that descends into the mouth of Ma'adim Vallis, a channel that opens into Gusev crater. Spirit is currently traveling toward the "Columbia Hills," which lie to the left of the region pictured here. This image is similar to another PanCam image taken on Sol 68, but Gusev's ridge is more visible here because the atmospheric dust caused by Winter dust storms has settled. Scientists expect to get even clearer images than this one in upcoming Soles".