Warsaw's long and eclectic history left a noticeable mark on its architecture and urban form. Unlike most Polish cities, Warsaw's cityscape is mostly contemporary – modern glass buildings are towering above older historical edifices which is a common feature of North American metropolises. A concentric zone pattern emerged within the last decades; the majority of Warsaw's residents live outside the commercial city centre and commute by metro, bus or tram. Tenements and apartments in the central neighbourhoods are often reserved for commercial activity or temporary (tourist, student) accommodation. The nearest residential zones are predominantly located on the outskirts of the inner borough, in Ochota, Mokotów and Żoliborz or along the Vistula in Powiśle.