Sion Fort
From bombaywiki
Sion Fort was constructed atop conical knoll for defense purposes, under the regime of the English East India Company, between 1669 and 1677, when Gerard Aungier was the Governor of Bombay. When it was built, the fort marked the boundary, so it could keep a watch out for an attack from three sides– the Siddis from South Mumbai, Portuguese from the North and Marathas from the East. When the Marathas and Peshwa dynasty declined and Salsette came under the British control and the watch tower as such was completely ignored, which is reflected in its current condition. The entire structure is broken down and is in ruins.