The Pokemon Enclosure.

Larger than it actually sounds, this is where they keep Pokemon that are staying at the lab. It's a large outdoor enclosure, filled with trees, shrubs, berry plants, a river running through it, as well as a few ponds here and there, and, near the middle where a large hole filled with flattened dirt, a fire that is always going. People may come here and catch Pokemon that are wild if they wish. You can usually tell, since many people give a man made item to their Pokemon.