Typically it's: blasted, flat, and gray, like a desert on the moon. Now it's frosty, expansive, and scary.
Culturally, though, I'm drawing on my hometown. I live in Savannah, GA, and we're a weird combination of rustic / historic, haven't-changed-since-the-fifties buildings and corner shops, old civil war houses and architecture, and progressive, new era hippie art movements. You'll see an old department store that's still got the same signage and charisma attached to it from being the first Macy's, or whatever, but now it's a Quizno's. Imagine if half your town was in one time period, and the other half was eagerly embracing the future. It's weird.
So my Apocalypse Worlds are all like that: flat, open area with lots of landmarks, dotted with cultural hubs and a surprising (for the setting) amount of technology. Go meet the tree-people in our current game: they're savage hunters in the snowy forests, simple traders, but they've got night-vision goggles and stealth tracking equipment, and like, walkie-talkies.
Anachronistic is the word, maybe? Not quite.
There's history everywhere, too. Dig deep enough, and you'll uncover ancient cities, or relics of a bygone era. But everyone knows about that, they're just so accustomed to it being there that it's not even a thing.
Quirky.