Nandi (Bull) - In Hindu Mythologyis Nandi is Lord Shiva's primary vehicle and is the principal follower of Shiva and also gate keeper of shiva and parvathi. Temples dedicated to shiva and parvathi will have stone images of seated Nandi facing the main shrine.
This giant 350+ year old monolithic statue of Nandi (Image below) is located on top of Chamundi Hill, Mysore. Its one of oldest iconic structure in Mysore and is 3rd largest Nandi statue in the world. This is an open shrine and Nandi is in active worship possibly ever since it was created
Originally this was a colossal boulder. One can find similar boulders around this site, there is a small cave temple under an overhanging boulder dedicated to Shiva right behind the this Nandi statue. The Nandi is portrayed in sitting position in an about to get up posture. You can see many sequences of bells and garlands carved over the Nandi. This statue is located almost at the 3/4th the way to the hilltop. If one decides to take the stairway, they have to climb 700 steps to reach Nandi and another 300 steps to reach the hill top. There is a beautiful temple on top of the hill dedicated to Goddess Chamundeshwari.