This is off Castle Square and as with Castle Square, it is tunning in good light, fun, lots of good restaurants & cafés, and wonderful museums. Make time and plans to visit the Warsaw Museum in the Old Market Square. Absolutely worth the time.
All depends on the exhibitions which change often. The staff of the museum is very friendly and helpful. We have seen a movie which was bizarre (to be expected in the contemporary art museum) and Janek Simon's exhibition which had some interesting parts: Nollywood (Nigerian movie industry) - idea of remaking Polish classic "Ashes and Diamonds" in the Hollywood convention, reflections on Polish maritime traditions and colonial ambitions from 1930-s. There is a good restaurant in the building and if you like long walks, you can start there and walk towards the river and continue on Vistula Boulevards towards the Old Town making a long, diverse and satisfying day.