...previously on plenty
This is what I could see under the bridge/short tunnel that I posted last week.
I didn't know at the time what it was and spent some time looking at maps and scouring websites trying to figure out where it was.
After it was featured a couple of times on Stockholm by Pixels, I finally worked it out and using googlemaps and virtual earth managed to retrace my journey around the city.
This is Sergel's Torg aka Fountain of Youth.