Giant bee hive

The giant beehive is a structure that looks like a giant version of the beehive block, but it's big enough to climb into and explore. It's packed full of realistic piles of honeycomb blocks. The giant beehive only spawns in the dark forest and only spawns once in each world.

There's a boss mob inside, the queen bee, who has 2 variants: regular and rare. The regular one looks like a regular bee but bigger and wears a diamond crown. The rare variant has more spread out antennae, is purple and orange, and wears a golden crown. The queen bee is too big to get out of the hive, which only has a small entrance, like a real beehive.

The story behind it: the bees may look like regular mobs but actually they're not. Bees don't spawn in dark forests but that's just what they want you to think. Their queen lives there. The queen bee was undiscovered until now.