Las sandalias de Ulises
Ostrołęka
Ostrołęka is 120 km from Warsaw and has about 54,000 inhabitants, although it's very famous for having nothing very characteristic and is somewhat insdustrial, it has a pretty nice monastery and the city also has its charm. The connection to reach it isn't very good as there's no train from Warsaw, you have to go by bus, but it's closer to Treblinka than Warsaw. Although I didn't expect to see anything but a typical modern Polish population, but they have pubs, I went out over there and I had a great time!