None in Ausralia?
Nope, unless you count things like this: https://www.kryalcastle.com.au/
Although there are plenty of old coastal fortifications, which don't appear to count even though things like Fort Siloso in Singapore (a WW2 vintage concrete bunker) apparently do.
alt Hacker News
Nope, unless you count things like this: https://www.kryalcastle.com.au/
Although there are plenty of old coastal fortifications, which don't appear to count even though things like Fort Siloso in Singapore (a WW2 vintage concrete bunker) apparently do.