Here is another radar image of Venus. See another view at a previous post.
This image was made by transmitting a 13 cm wavelength signal (2.3 GHz) from Arecibo and picking up the return signal with the Green Bank Telescope.
Bright areas are rougher surfaces. The detail is good enough to see many features such as mountains, volcanic domes and a few craters.
Craters on Venus are relatively few at least compared to other planets. Given the density of the atmosphere most probably are destroyed in the atmosphere.
Image credit: NRAO.