I'm going with bridge too. Looks like a road bed that a creek channel cuts through, also appears to be walls on both sides with wings turned back. Most likely concrete, the top of the right side is very bright as is the left indicating it's hard. Then you have the debris in the channel that appears to be the truss sides of an old steel bridge. The road surface is clear on the left side also.

I have been wrong MANY times before though.