It was some sort of secret lab and most things were destroyed, but from what Adma could see, they seemed to be researching on people and animals.
Adam could understand why his aunt would want to destroy such a facility, since it was horrible to produce such things, but how did his aunt know about it and there was such a strong evil energy lingering after she had left, worried him.
After exploring the facility, it was large and there were smashed pieces of all sorts of technological appliances that Adam had never seen before, while most things had been thoroughly destroyed.
It was to the point that Adam had to assume that his aunt held a personal grudge towards those within the facility, or had stolen something and didn't want to leave any traces.
Either way, if it truly was her aunt that had been here like Nathaniel's information said, then she was definitely much more powerful than him.