Pruszków, Poland

This gritty industrial hub outside Warsaw is hardly the picturesque Polish paradise many imagine. With a notorious crime syndicate operating here in the 90s and 2000s, the city's dark underbelly is hard to ignore. Pruszków's population of over 55,000 has seen its share of hardship, from the 650,000 Poles who passed through its Nazi transit camp during World War II to the 13,500 sent to Auschwitz. And while the city has developed as an important transport and manufacturing center, the bureaucratic headaches are a persistent nuisance for residents. Ultimately, Pruszków is best suited for those with a high tolerance for industrial sprawl and a willingness to navigate its complicated history.