"There is certainly no shortage of folks playing Black Ops at the moment, and while that means you won’t be wanting for a full match anytime soon, it also means the competition is pretty stiff out there. So to ensure you have the best chance at survival, we’ve put together the following map walkthroughs that will show you the nooks and crannies, layouts, and preferred attack positions of the various maps that have served, and will continue to serve, as the site of untold number of virtual massacres."
The video on Black Ops 1 shows some separate rooms, assets, and other features which exist outside of the boundary of the game.
From DownSights: "Black Ops is not Black Ops without Nuketown. Following the tradition of releasing Nuketown for Black Ops games, the new Black Ops Cold War game also offers a revamped Nuketown called Nuketown '84.
Nuketown '84 has the same dimensions and map layout except for the aesthetics. The map's aesthetics have changed to fit the 80s theme, with destroyed buildings and graffiti-filled walls compared to a clean 50s suburban neighborhood seen in Black Ops 1."
Jacob writes: "What do we have with the original Call of Duty: Black Ops? Quite simply, one of the best Call of Duty titles of all time."