Grand Central Market is in downtown LA in the middle of a bunch of buildings. Everything is inside but it's open-air so you can still get a breeze as you're walking. The vast majority of it is restaurants and other shops with produce and snacks. There is some clothes shopping available but it's not a ton so don't expect to come here to get a new outfit. Instead, plan on getting some delicious Mexican food, Italian, Asian, German, American, and much more. Essentially, just come hungry and you will be thoroughly satisfied.
It's not a huge place but it's pretty spacious with plenty to look out. Currently you must eat outside and drink inside but we imagine that will change once all this craziness is over. We definitely will be back to try some more stuff!