It's just there because it can be and, in the post-apocalypse, probably would be. This shed near Relay Tower 0BB-915 is just that spot. Let's just blow some shit up for no reason, because reason died along with everything else when the bombs fell. Just to let off some steam and see some explosions, because why the hell not? There's no law, no environmental concerns, no sound ordinances. What's a survivor to do? Well, if someone had a little shed on a cliff and also had a bunch of gas tanks and a lot of free time on their hands, they could build a few ramps to launch those tanks.
In Fallout 4 the world has gone to hell, everything has been destroyed, and there are mutants and monsters and radiation everywhere. There are bigger and more important locations in Fallout 4-and I'll get to them in a minute!-but I'm going to start with a simple yet great one. Playing Fallout 4 without ever leaving Sanctuary For more on Fallout 4, check out these other great stories: