Be very careful. There are many blurry photographs of alleged work benches that you see snapped by people in your situation. Usually taken on the fly, through piles of junk, as they catch an unexpected glimpse of the alleged work bench. But careful follow up research by qualified shedologists has failed to find conclusive proof that such a thing exists in reality.
Many of them are simply large sheets of plywood laid flat on top of a pile of junk at some point in the past by someone who then went on to build up a further pile of junk on the top of the plywood. When the top pile is removed, the piece of revealed junk plywood can often be mistaken by the amateur for a workbench.
Giveaway signs usually include the pile of solid junk underneath the flat, alleged benchtop-like flat surface and sometimes a second sheet of junk plywood laid flat on top of an initial layer of junk about halfway between the top flat surface and the garage floor, giving the impression of a storage shelf. Often this faux shelf is covered with half used tins of paint so old it has turned solid in a bid to approximate benchness.
The presence of a vice attached to one end of the top flat surface is not regarded as proof of benchness. Over the years many merry pranksters have attached vices to pieces of scrap plywood, old doors laid flat and the like in order to fool unsuspecting bench-seekers.
One way to test what you have for true benchness is to take a small, round, very expensive and totally irreplaceable component from any rare mechanical device and place it in the centre of the flat surface you have uncovered. If the part rolls immediately toward the wall behind the flat surface then disappears down the gap, never to be seen again, it's a bench.