Mint and Gate No. 4 (Sadan Shah Gate), Pavagadh, Gujarat - 31st Dec 2018

Google Maps : Location (250 meters to the west of Sat Khaman)

Mint : Wiki NA

Champaner-Pavagadh Archaeological Park : Wiki

Might be part of the original (not restored by ASI) fort wall:

Champaner-Pavagadh Travel Guide : LINK