From the movie AVP: Alien vs. Predator, the room within a Yautja pyramid where Xenomorphs are bred from that adolescent Yautja can take part in initiation hunts. Because all this horror was typically circular and very tall, its high walls lined with the skulls and spines of those who had been sacrificed there. The victims lie on several stone slabs arranged in a circular pattern around the center of the temple. The Eggs are delivered by an automated system installed by the Yautja. Remaining there until the Chestbursters inside them emerge killing them and signalling the start of the hunt. Directly beneath the sacrificial chamber is another room containing a sarcophagus that holds the young Yautja's Plasmacasters, their prize for succeeding in their hunt.