What is "korigad"

Korigad (also called Koraigad, Koarigad or Kumwarigad) is a hill fort located about south of Lonavla in Pune district, Maharashtra, India. Its date of construction is not known but likely predates 1500. It is about 923 m above sea level. The planned township of Aamby Valley is built over the fort's southern and eastern foothills. The closest village is Peth Shahpur, about north of the fort.