Konda Reddy Fort is Kurnool's main historical monument, a three-level fortification dating to the Vijayanagara period of the 12th to 17th centuries. The fort sits roughly two kilometres from the railway station and was used primarily as a watchtower controlling the Tungabhadra crossing below. Its semi-circular bastions and gateway towers survive in partial form, and the Andhra Pradesh government has carried out restoration work in recent years.
Visitors can climb to the second level, where an observation tower gives views over the city and the Tungabhadra River. The first floor contains a large portico and enclosed chambers. The ground floor remains closed. The fort is most interesting early in the morning when the light is good and before the heat of the day sets in.
A walk through the ruins takes about an hour. The structure is compact enough to explore fully without a guide, though local guides are available at the entrance and add useful context about the Vijayanagara period and the Kurnool Nawabs who later controlled the fort.