A military bunker located near Trutnov, Czechia, at coordinates 50.276377, 16.434773. This structure appears to be part of the extensive fortification network built in the region during the 20th century. The Czech border region has a long history of military installations dating back to the interwar period and continuing through the Cold War era.
The specific designation 'C/64/A-160 Z' suggests this was part of a systematic numbering system used for military installations in the former Czechoslovakia.