Slate City Gym
Slate City Gym is known to be built a top an excavation site for pokemon fossils. It’s leader , Samantha Stone, is a world renowned Petrologist and Paleontologist.
Her gym is also a lab where they reanimate extinct fossil pokemon. It’s arena is meant to be a recreation of their natural environment hundreds of thousands of years ago. An outdoor jungle caged in by an electric fence.
For defeating the top pokemon from ancient history and Samantha, trainers receive the Jurassic Badge.