Mosty Młyńskie can be seen as the continuation of Most Piaskowy – both of them are in one line and connect the southern part of the city with Śródmieście. The current constructions are from 1885. Two bridges are to be seen as separate constructions. Polish wiki entry.
odra
Most Piaskowy
Most Piaskowy, as it is today, has been built in 1861. It crosses Odra and connects Wyspa Piasek with the south part of the city (Old Town). Polish wiki entry.
Most Słodowy
A tiny bridge, which is the only one to get to Wyspa Słodowa with a car. It crosses one of the Odra channels and connects Wyspa Słodowa with Wyspa Młyńska. The bridge as such existed here already in 1838, the current construction is from 1911. Polish wiki entry
Kładka Piaskowa
This footpath was built in 2002 and it connects Wyspa Słodowa with Wyspa Piasek. Polish wiki entry.
Kładka Słodowa
Built in 2003, the footpath connects Wyspa Słodowa (Słodowa Island) with Śródmieście district. Polish wiki entry.