This structure was originally a pier for the Manchester Bridge, built in the early 1910's, that connected downtown Pittsburgh with the Northside, across the Allegheny River. The bridge was demolished in the late 1960's after its replacement was built a little farther upstream. It was later carved out and made into a memorial for Fred Rogers (you can see the statue's back). It always reminds me of the Kurt Russell movie and the TV series, though.
Pittsburgh "Stargate SG-1"