Venus (TPR) Venus (TPR) This radar image, obtained by the Arecibo Radio Observatory, shows the large highland region on Venus called Ishtar Terra. Blue indicates smooth areas, while yellow and red areas are rough. Maxwell Montes, the bright area in the bottom left (east), is the highest area on Venus. Freyja Montes (center right, or north) and Akna Montes (center top, or west) are similar, but smaller mountainous areas. The large, dark blue area in the center is Lakshmi Planum, a high smooth plateau. (The curve along the right of the image is the edge of the data, not the limb of the planet).