Underground Laboratory

There should be a new structure found underground called an underground laboratory. It's basically an abandoned area with "experiments" including zombie villagers trapped in cages, potions, etc.

The underground lab would also be a good way to add features from Minecraft: Education Edition into the main game, like the chemistry blocks. The lab could also contain loot such as potions of nausea that can't be crafted or obtained in any other way. The structure should be rare and can contain multiple rooms, separated by iron doors