“Black Widow” (2021) – Budapest. Hungary’s capital city is also the country’s largest, with 3 million people living in the greater metropolitan area. Budapest is known for old-world architecture and a slew of museums, theatres, and operas. If you’re hungry, a mean goulash or chicken paprikash could satisfy, or an easy, breezy boat ride along the Danube River might soothe the soul. Well, Marvel fans – including this critic – have wondered about some specific events in the Queen of the Danube – involving Natasha Romanoff (Scarlett Johansson) and Clint…