The Kolaba Fort was constructed by Shivaji Maharaj. It is located 2 km inside the sea. Visitors can visit the fort only during low tide.
The fort consists of sweet water well in the middle. There are many temples and fortifications along guns which face the sea. The fort is 300 years old.
Carvings of tigers, peacocks, and elephants on the entrance arch can be seen. Near the gate there are shrines of Mahishasura and Padmavathi and other gods along with fort deity. A Ganesha temple was built in front of the sweet water tank in 1759. Alibag Fort also known as Kulaba Fort after the name of Kamaludin Shah Baba (Ku-La-Ba).
A token entry fee for the visitors is charged by the Archaeological Survey of India.