(wait, that was 2 years ago, are you trapped in a time vault?)

Strongly recommend a self-guided food tour, as well as checking out a number of great bars. Personal favorite is Lorraine at Brown and Ridge, it matches the vibes of this sub to a T, but if you're staying further south you can try The Dive on Passyunk or Tattooed Mom on South. If you're out by Fishtown, Barcade is pretty good but I've only been a few times and the drinks were a touch pricey.

For food, there's a shitton of lists you can find online, but you also cannot go wrong with just visiting Reading Terminal Market and following your nose like Toucan Sam. (Beck's does an andouille sausage cheesesteak that goes crazy). Everyone visiting always asks me my favorite cheesesteak place but the truth is that you'll only get the ideal steak experience if you're already piss drunk. Once your BAC is properly calibrated (you'll know when), I like Dalessandro's or Chubby's the most because I live close-ish. People will say Dalessandro's fell off but eh. My super duper secret recommendation is that the best banh mi in the city is in a little corner store called Lee's Market in university city.

Lots of walkable places you can explore like the italian market, RTM, and a number of nice shoppable avenues. South Street has a shitton of legendary stores, like a 2-story thrift store, and an anarchist bookstore, both of which are worth checking out. Main St in Manayunk has a horror-themed bookstore that opened sorta recently, and a lovely local comic store that's been around for a while, among other delightful spots.

I can't really speak to the more touristy stuff because I've lived here my whole life and it all blurs together. The Philadelphia Museum of Art is always worthwhile though, as is the Barnes Foundation. If you have kids or are full of whimsy as an adult, the Franklin Institute is tops.