Maybe national parks? Probably the best places for nature sights. For food get tripadvisor mens
Iam from Warsaw, so there is a lot of things to do in warsaw but i recommend moving by a bus because there is traffic in city center like all the time. Outside warsaw check out Zakopane and mountains that are near. But warsaw alone can take couple of days of your trip.
For Polish food I would say Pierogi and Żurek, otherwise anything you want to eat.
For nature Tatras (Morskie Oko), Słowiński National Park, Hel, Bialowieza Forest
Which Polish city has most young people for dating? Thank u polish mens
if you will drive with a car i feel really sorry for your money
go to mazury for summer house near the lake
Go to Gdańsk bro, pretty nice city and check Hel - its near Gdańsk.
kampinos its a national park next to the Warsaw
In Warsaw go to PKiN, Science Center Kopernik (must go) and if we are talking about nature stuff, there are lots of nationals parks but i reccomend going to Mazurian lakes and we have some decent castles in PL. Take care
Warsaw city center is kinda meh, it's fine but boring like most other capitals. The districts you want to see are: Stary Żoliborz, Stary Mokotów and Saska Kępa - nice places to eat, good coffee, interesting architecture. You won't find this in trip advisor :)