Does the 'flashback' word have a negative undertone? Can I use it for referencing some good events in the past, the memories of birthdays, weekends etc.?

Hello from Saint Petersburg Hello everyone! I'm a Russian guy from Saint Petersburg. I'm 33. I have been studying English for a long time already and can say, from a foreigner's perspective, that English language is really great which I like very much. I think my current language level is upper-intermediate or advanced. Currently I'm trying to find an efficient way to improve my language fluency and build a vocabulary. Also I am interested in meeting new people and making friends. Best, Konstantin

What would you recommend to visit and see in NYC?

Hey guys! Can you recommend some good places / events to visit and see in NYC ..for a family with kids. For example, walk in Central Park, visit Bronx Zoo, what else? Please advise.