There is a tall Shiva idol on NH8 on the way to Gurgaon from Delhi, it is a landmark and I have seen it many times. I am not sure how high it is but always use to wonder if there are other that high statues of Shiva. Some time back I visited Surendrapuri, Yadagirigutta, Andhra Pradesh near Bhongir Fort and there I photographed this another very tall Shiva idol. Not sure which one is tallest or other such tall statues of Shiva or other Hindu gods in the the country. The specialty of this idol is that on one side it is Shiva with 5 heads and on the other side there is a Hanuman Idol, so basically it is a double idol.
Would love to know more about them. If you look at the height of the statue and men below it, you get some idea how high the idol is.
The Shiva Idol Dwarfs The Men In Front
I am not sure it is used for worship as it is outside the museum and not part of a temple, while the one in Delhi though not part of temple is actually worshiped by a lot of people.