You wander deeper into the city.  After traveling a couple more blocks, you spot the Power Plant!  After eavesdropping that conversation at the Center you want to see what that one guy ran into in there.  Enter the Power Plant

You also come across a dark alleyway.  "Hmmm.  Maybe this might lead to a shortcut to the Gym," you think.  You decide to enter the alley and see where it leads. (Lv 10)

After that, you decide to either go on or head back.