Numbers begin to lose meaning when they get that big. It's hard to imagine things at that scale for most people.
I was not aware that there was a salt flat in Oklahoma, especially not one that big.
I lived in Midwest City for 4 years back in the 1960s when I was a kid. My dad was in the Air Force and stationed at Tinker air base. I mostly remember the lizards that we used to chase after and sometimes catch.