I don't want to write a tip for Warsaw... I want to write a tip for the small mountain village in South Poland I passed through once & only once, and could never find again because I never noted the name... and the roads in Poland are notoriously confusing (not to mention dangerous - do NOT begin a road rage contest with a Polish truck driver on his own turf - you will LOSE).  That place was one of the most unbelievable little pockets of beauty I've ever seen, stone cottages two stories and higher, a babbling brook with cows just wandering about the place - I swear I saw a black haired Tess of the D'Urbevilles out getting ready to milk them.  Idyllic, but like all idyllic scenes - it's be ruined if you stopped and tried to fit into it.   Anyway my tip on Warsaw:  don't get stuck in rush hour traffic. In fact, don't drive into town at all, go by foot and just find yourself a nice place to stay... then walk out at night and meet all the lovely people - they make eye contact!  They say hello to strangers!