Popping up from the modern city part of Osaka to the area of the Osaka Castle is like stepping through time. Seeing the walls that protect the castle, while it feels like the castle itself is overlooking at you makes you feel small. The castle looks as different from the inside as it does from the outside to European castles. It is really worth to pay the 600 yen to see the museum inside the castle. You might even see something interesting while walking towards the entrance of the castle, like a man taking his pet iguana for a walk.