This is a remake of the map Nuketown from Call of Duty Black Ops. You can play team deathmatch, free-for-all and capture the flag on it. All of the underneath of the map is filled in with TNT, so at the end of the match you can blow the map up, but make sure to exit without saving.
Here is a picture of Nuketown during the day.
Here is a picture of it during the night after it has been blown up.