The bears at the zoo in Warsaw are famous. What is unique about them is that they are on the outside of the Warsaw Zoo just two blocks away from the main square in Praga. Walking down the sidewalk, you pass by their habitat which seems, at first, alarming because it seems to exposed to the public. But once you get closer, you see that the bears are separated from the railing by a big wall and deep moat which apparently keeps them from getting out.
info:Take tram 4 from the center to Praga. Once you go past the bridge, look the left, you will see a park and the bears. Get off at the first stop after the bridge.