The Map pack 3 description says this

5 All-New Maps and Zombie Experience on Xbox 360 June 28
Obliterate the competition with "Annihilation," the newest downloadable content pack for "Call of Duty: Black Ops", with 4 unique Multiplayer Maps and a wild new locale for the latest in unrelenting Zombies action.

Jump in to battle on Multiplayer with: "Hangar 18," located in the highly classified military base of Area 51 where you will fight through experimental weapons labs, the SR-71 test hangar, and a mysterious autopsy room; "Drive-In," close quarters combat through a 60's American Drive-In theater, whose last showing was "Attack of the...", complete with a snack shack and a classic arcade; "Silo," infiltrate a massive secret Soviet nuclear missile site under construction in this multilevel battleground; and "Hazard", play through this coastal golf course fit for a Dictator, on the cliff sides of Cuba, where stocked clubhouses and manicured fairways meet snipers hidden in sand traps.

Zombies are back in "Annihilation", as players unearth the mysteries of "Shangri-La," a legendary shrine lost in an exotic jungle, where new undead species lurk within a treacherous labyrinth of underground caverns. Navigate through deadly traps and solve the dark secrets buried within the shifting walls of this zombie infested temple

This means, that you can maybe open doors or secret passages... i cant get map first day because i need a new mic but look for easter eggs in the walls, on the walls, maybe signs on the walls when you go through traps, possibley even the celing.


**Please +Rep and Thank Topic for this find!!!**