Did the place where Desmond and Penny get their photograph taken look exactly like where Jin and Sun first met? I know, one is supposed to be London and the other is supposed to be in Korea, but didn't it look the same?

From "Flashes Before Your Eyes": http://gallery.lost-media.com/displayimage.php?album=1250&pos=624

From "...and Found": http://gallery.lost-media.com/displayimage.php?album=757&pos=534

It looks like the same barrier, maybe just a bit cleaner... Could it be the same set location?

I think the bridges with the rounded supports might be where you're you're getting hung up. The river is obviously wider and murkier in the Des/Penny scene. Some of the architechure looks similar. I'd say if there are similarities, it may be explained away by shooting site, and doesn't significantly impact the stories.

It might just be me though.....

I'm more looking at the stone border between the street and the water. The background can easily be changed with CGI, but the border itself looks the same.