An empty parking lot is effectively the gold standard for opposite-of-claustrophobia as the article seems to intend the term. It's the least claustrophobic space possible on the surface of the Earth. Even an open meadow is less open than an empty paved parking lot because it has small bushes and shrubs everywhere. This matches my intuition as a mild sufferer--I actually try to picture a brightly lit gas station parking lot if I'm feeling claustrophobic.