[Question] I need help finding a map from a long time ago

So awhile back I used to play Garry’s Mod, however I haven’t played for a couple of years. I’ve been searching online for several hours for an old GMod map that is basically a raceway, but I remember it having a tower and an elevator with some secret underground part to it. I believe if you make the elevator go upstairs you can go underground. Trying really hard to find that map again, thanks in advanced for the help guys, I’d really appreciate it.