香港邊境禁區
The Frontier Closed Area (FCA) is a fenced stretch of land along the northern border of Hong Kong, which serves as a buffer between the closed border and the rest of the territory. For anyone to enter the area, a Closed Area Permit is required. Between 1951 and 2012, it contained dozens of villages over an area of 28 square kilometres. Upon several stages of reduction, by 2016, the border town of Sha Tau Kok remains as the only settlement within the FCA.