OK: it's a utility hall, leading to a garage. 3x28 feet - TWENTY-EIGHT FEET!!! - with no doors or windows. And those are common walls, not yours, so you can't do any to them.

It's narrow and you'll be carrying things as you walk between living area and garage so you want minimal obstructions. It has to be done with surface finishes.

1 - Paint over the mural unless you like it.

2 - Color blocking - paint 7 or 9-foot sections in different colors to break up the lengthy wall space. They can be strongly contrasting or closely related, just different. Put slightly different flooring in each section to strengthen the illusion that you are passing through different rooms.

3 - Embrace it? Faux paint a cartoonish tunnel effect in it? A bowling alley? Treat it like a hotel or old office building hallway and paint fake doors along either side, with room numbers or business names.

4 - Small gallery? You don't have the room to stand back and appreciate many pictures, Convert that single light into a string of wall-washer flood LED lighting along the upper edge of the wall to the right, most aimed at the wall to the left, some aimed down at the floor. Attach interesting posters and photocopies of family pictures to the opposite wall, in several clusters of different sizes. These will have to be flat on the wall, and not priceless family treasures, because you'll hit anything that sticks out into the hallway with your shoulders or a large package.

If you combined colorblocking with the gallery you could have a different subject in each of the "galleries", marked off with color.