Magnificent fort is located in Chitradurga. It is very beautiful. Worth visiting. It is maintained by archeological department. Famous ruler of this fort is Madakari Nayaka. There is a passage in which a person can crawl and go inside. This passage is named after heroic lady Obavva as "Obavvana kindi" who protected the fort from enemy attack. Attached are some photos of Chitradurga fort.
Pictures source: Google