Dunkirk (2017 film) was filmed at least partially in secret.
Dunkirk (French: Dunkerque [dkk] (listen); French Flemish: Duunkerke; Dutch: Duinkerke(n) [dykrk(n)] (listen); UK:  dun-KURK, US:  DUN-kurk;) is a commune in the department of Nord in northern France
In September 2018, Dunkirk's public transit service introduced free public transport, thereby becoming the largest city in Europe to do so

