Nandi, the sacred bull is the vaahan of Lord Shiva.Normally, we will find the Nandi in front the sanctum sactorum. The nandis of Lepakshi (click here for a post) and Thanjavur are huge.
Nandi images are also common on the walls of any Shiva temple. These are from the walls.
May Nadikeswara bless my 400th daily post.