To the north of Mumbai starting from Tarapur Fort close to the Gujarat border, there are 14 forts along the coast covering a distance of approximately 100 km. In this list, between the Dronagiri fort at Uran and Kolaba fort at Alibaug, there is a wide stretch of about 40 kms that seems to be left unguarded. In addition, just south of Uran is the Karanja creek where the Patalganga river terminates after snaking its way down from the Sahyadris at Khopoli.
I was curious to see if there was any fortification, however small to cover this gap. And sure there was!