What do you mean? Most of our buildings are either post-german brickhouses or typical soviet commieblocks. I guess Warsaw additionally got some skyscrapers but that is modern architecture that is also relatively uniform across whole west. The only polish architecture would be really old buildings (like medieval and renaissance eras), but back then you had general styles shared on whole continent, usually inspired by Italy or France, and family houses in countryside, something you will not find a lot of in Warsaw itself. For that you'd have to visit southern, mountainous regions (https://en.wikipedia.org/wiki/Zakopane_Style
), or northern east of Poland which is filled with villages typical for eastern europe, forests and lakes every now and then. When thinking about this country you have to take into account that it was erased from the map for over century around the time of industrial revoluion and it was almost completely destroyed by World Wars, so finding anything purely polish from that period of time can be hard.
As for culture, what interests you so much in polish one?