Sankagiri Fort

Sankagiri Fort, also known as Guptha Giri, stands on a hill at the town of Sankari, or Sankagiri, 22 km from Erode and 38 km from Salem. The fort rises to 707 m and covers 558.58 acres. It was built in the 15th century under the Vijayanagar empire, and its 14 walls ring the hill, the last of them added by the British.

Because only one side of the hill can be climbed, the fort was a key military base, first for Tipu Sultan and then for the British East India Company, which used it to store taxes collected from Kongu Nadu. Within its walls are a 'death well', a granary, two oil stores and an explosives store, two mosques, two Varadharaja Perumal temples, old British administrative buildings and the cemeteries of armies once stationed here. The Archaeological Survey of India maintains the site.