This global view of the planet Venus is a mosaic of images from the Magellan mission. The Magellan radar mission was able to map almost all of the surface of Venus, because radar instruments can see through dense clouds like those that enshroud the planet. The atmosphere of Venus is mostly carbon dioxide. The temperature at the surface is hot enough to melt lead.
The bright band that runs across the planet is a highland area of mountains and canyons. Many of the dark areas represent lava flows. Craters are present, but not in the same abundance as on the Moon and Mercury.
Here is a photograph of the surface of Venus taken by the Russian spacecraft Venera 13 in 1982.