Deathclaw cage

Deathclaw cages are found in certain Enclave camps and some are located inside of Raven Rock in Fallout 3. They contain a deathclaw which will be released by the Enclave officer who carries the Deathclaw Cage Key, or any individual who has a proficient lock pick skill. They only show up when the Enclave become active, so don't appear until late in the main quest.