Golconda Fort is a historic citadel and fortress located in Hyderabad, Telangana, India. It was originally built in the 12th century as a mud fort by the Kakatiya dynasty, but was later expanded and fortified by the Qutb Shahi dynasty in the 16th century. The fort complex covers an area of approximately 11 km² and is surrounded by a 10 km long outer wall.

The fort has numerous structures and buildings, including the main gate or Fateh Darwaza, the Jama Masjid mosque, the Taramati Baradari pavilion, and the Bala Hissar pavilion. The fort also has a system of water supply through a series of tanks and pipes, which helped in the water management of the fort.

One of the most interesting features of Golconda Fort is its acoustic system. The architecture of the fort is such that sound waves could be transmitted from the entrance to the top of the fort, a distance of over 1 km. This system was used as a warning mechanism in case of an enemy attack.

Golconda Fort was also known for its diamond mines, which produced the famous Koh-i-Noor and Hope diamonds. Today, the fort is a popular tourist destination and is managed by the Archaeological Survey of India.