If that wire is direct buried, there's no way in the world you'll pull it out. If it's in pipe, it may pull, but it won't be easy. That is 2/0 direct bury UG triplex and it is wrapped together from one end to the other. You will have to pull all 3 wires at the same time. If you can get a Kellum grip (works like Chinese handcuffs) to slide down over the wires when you get them out of the box, that will make them easier to pull. If you have a BIG tractor handy that has a front bucket loader, you could catch the wire as low as you can, then raise the bucket up to pull it out of the pipe. Repeat that about 872 times and you'll have it out! LOL. Good luck to you. It will be a lot of work for no more money than you will get out of it.
You can buy a cover at the electrical supply house for a few bucks to close up that hole the conduit and wire went thru. Close up the hole the bare ground goes out of with plumbers putty or caulk to keep the wasps and dirt dobbers out.