The ethereal Birla Mandir, constructed of white Rajasthani marble in 1976, graces Kalapahad (Black Mountain), one of two rocky hills overlooking the lake of Hussain Sagar. Dedicated to Venkateshwara, it's a popular Hindu worship centre, with a relaxed atmosphere, and affords magnificent views over the city, especially at sunset. There are several imposing statues including a huge granite image of Venkateshwara. Disabled access is good: there's a lift in the curious clock tower.