Ajmer is surrounded by the Aravalli Mountains. The city is sied on the lower slopes of the Taragarh Hill in the Aravalli Range. It is situated almost in the centre of Rajasthan. To the north of the city is a large artificial lake, called Anasagar with a marble structure known as Baradari. Ajmer is protected from the Thar desert by the massive rocks of Nagpathar range.