Korigad is a fort located about 20 km away from Lonavla in Pune district

Pune District

Pune District is situated in Maharashtra state of India. Pune city is the district headquarters. In the last census on 2001, the total population of the district was 7,232,555, making it the fourth most populous district in India . Urban population comprises 58.08% of the total population...

, Maharashtra

Maharashtra

Maharashtra is a state located in India. It is the second most populous after Uttar Pradesh and third largest state by area in India...

, India. Its date of construction is not known but likely predates 1500. It is about 929 m above sea level. The closest village is Peth Shahpur.

This fort was incorporated into his kingdom by Shivaji along with the forts of Lohagad

Lohagad

AD) built several structures in the fort such as a big tank and a step-well .On the west side, there is a long and narrow wall-like fortified spur called Vinchukata because of its shape...

, Visapur

Visapur fort

Visapur fort is a hill fort near Visapur village in Maharashtra, India. It is a part of the Lohagad-Visapur fortification.- Location :...

, Tung

Tung Fort

Tung Fort is a hill fort in Pune District, India.- Location :It is about 12 km from Malawli railway station and can also be approached from Lonavala. Tung Fort has an elevation of 1075 m above sea level. After the building of Pawna dam, it is now surrounded by water on three sides...

 and Tikona

Tikona

Tikona is the dominant hill fort in Maval in western India. It is located near Kamshet around 60 km from Pune The village nearest the fort is called Tikona-Peth or Tokono-Peth...

in 1657. On March 11, 1818, Col. Prother tried to take over this fort but even after a prolonged siege could not make any headway. Finally on 14 March, by igniting the stored ammunition by means of a loose cannon ball he succeeded and this fort went to the British.

Now because of the Mulshi dam, a lake has formed close to the base of the hill on which Korigad stands. There are two lakes on the top of the fort. A temple to its patron goddess Koraidevi also exists along with several smaller temples to dedicated to Vishnu and Shiva. The former has been recently renovated and has a 3 foot high Deepmala(tower of lamps).The interesting part of the fort is that its wall is completely intact and one can walk along its entire perimeter(about 2 km). Its massive gate is also intact. Several ruins of older structures within the fort still exist. It has six cannons - the largest of which called the Laxmi Toph is located near the Korai devi temple.