Tucked away in a courtyard between ul. Ruska and ul. Antoniego is a splendid collection of Soviet era neons salvaged by the Neon Side Foundation - various logos and company names arranged on the walls of a quite communist-looking drab grey building. Essential viewing during a nighttime stroll; stick around for a cocktail or two at the hip Surowiec club which has found a home for itself here. The alleyway is impressive any time of day, however, as its also become a showcase for street art and graffiti.
After renovations to the elevations in the courtyard for much of the summer, the neons are now back on display!
I was there last year and there was nothing to see. I had to jump over bricks and stuff as they seem to be renovating the area. Dunno if it's open now, but it wasn't there when I went!
Now there is some renovation work, so you won't see anything :(