This is a map of Venus. Click on image for full size version (40K GIF) Image from: NASA

Alpha Regio and Ovda Regio are examples of what is known as a "Plateau Highland" of Venus. Among the volcanic features of Alpha Regio is Eve Mons.

Unlike volcanic rises, plateau highlands have few volcanoes, lava flows are relatively rare, small volcanic domes do not occur with the abundance seen in volcanic rises, and no shield volcanoes are to be found. They have steep margins, very similar to a terrestrial continental shelf, as compared to the gently increasing slope of the volcanic rises. They also contain the complex broken terrain called tessera. Tessera may provide evidence that the planet's surface is in motion.