Bhongir Fort. A fort on a huge, isolated, monolithic rock at a commanding height of 610 metres above sea level. It was built in the 10th century by the western Chalukya ruler Tribhuvanamalla Vikramaditya VI, and was thus named after him as Tribhuvanagiri. The fort was considered practically impregnable by invading armies. There is a moat that encircles the fort, a vast underground chamber, trap doors, an armoury, stables, ponds, wells etc., and they make for fascinating viewing. The view from top of the surrounding countryside is breathtaking.