I tried to do a google search for the image but the feature has disappeared. I used to be able to right click on an image and the dialog box that appeared included a "search google for image" line. I switched to DuckDuckGo recently I wonder if that's how I lost that feature.
It looks like an older version of the distribution boxes in my neighborhood for underground electrical services. I have a transformer in my yard, but down the street there are boxes that the drops to my neighbor's houses plug into the mains. My drop plugs in at the transformer. I wouldn't go poking around with a shovel. Call 811/Miss Utilities and have them mark your utilities, it's free. If I'm right, you'll have a bunch of red lines radiating out from that box. If they're orange, it is a telco or cable TV box.