Via Liz, except I’m not as well travelled so I’ve restricted myself to the USA.
Airports where I’ve changed planes certainly don’t count, and I’ve also omitted states I’ve only driven through on the way to somewhere else. As you can see I’ve done pretty well in the eastern half of the country, but west of the big muddy it’s all a wash—except for California’s golden shores (and across the Pacific, Hawai’i).