Where in Duluth?

From inside the mouth of the Abominable Snowman?

It looks a little like the view through a bus shelter skylight.

it is the view through a structure, but not a bus shelter. Amazingly warm to lay down in this structure while the kiddos played nearby.

A guess from Christian Anders Olsen on Facebook: Brighton Beach?

Geographically fairly close by, but not on Brighton Beach.

Somewhere near the play area at Lester Park?

Close! Old skating rinks at Lester, near Lester Amity chalet. I don't have a great shot of the whole thing, but it's pretty neat. Check it out if you get a chance.  We didn't build it, but it was a fun place to play. 

Also go to the chalet on the weekend. Warm place to hang out after skiing, biking, sledding or igloo building.