I made my own map in Call of Duty Zombies. It's part of NoahJ456's mapping contest.
If anybody wants to try out my map here's the link to the workshop page. Please let me know if you like it. I'll also post a link to Noah's contest voting. Please vote for my map if you wanna support me! Thank you, and I hope you have fun in my map! It's not an easy one!
https://steamcommunity.com/sharedfiles/filedetails/?id=3721963503
Jason Blundell's "Over, Under" Map Contest Voting – StrawPoll
I think you don't even have to register to vote.