This map has a discussion topic which can be visited here

CS_Roof, is your standard hostage rescue situation, the counter-terrorists begin there mission in an elevator, leading out into an office, the building you are in is about 80 stories tall, and the terrorists are cornered...so to speak, on the roof, with the hostages, the counter terrorists must fight there way up to the top floor and rescue the hostages, there is plenty to hide behind in the office complex, then when you hit the roof, you can duck and dive behind fans, and power generators until you reach the hostages.

This map will feature.
1. A locked door, behind which are 2 of the hostages. This door can only be opened by shooting off its hinges.
2. Several other things, but the above is what im most proud of