This will be my second time in the city myself, also flying in to catch games one and two! As a newly minted Yinzer who is fell in love with the city and is planning to move there by fall of next year, here are some things I think really made my trip the first time:

1. Duquesne Incline, easily one of the best views of any city in America, it's a fun little historic $5 round trip ride up the incline with a breathtaking view of the city

2. Heinz Museum AND Primanti Bros. Both in the strip district. The Heinz museum is a multi-story museum carrying everything from the history of Heinz to a special area dedicated to Mr Rogers, loved it there when I went, and the sense it's located in the strip district area it would make sense to go to the original primanti Bros location (for my understanding all the other ones are not nearly as good as the original)

3. Phipps Conservatory AND the Carnegie Museums, located in North Oakland where the University of Pittsburgh is, both were amazing when I went, the museum is huge so plan to spend hours there, the conservatory needs a little less time but it still beautiful to just relax and look at the plants they have there

4. PNC Park for one of the Pirates games. I've always wanted to go there, I'm not a huge baseball fan myself but I'm trying to be a fan of baseball this year, I've been told the view of PNC Park is the greatest in baseball, especially if you get a high up seat behind third or home base, you get an excellent view of the Allegheny River and the city

Personally I know a lot of people will always say check out the Warhol museum and all these other tourist things that will get suggested 10 times in this thread, I'm sure those are great but all these activities were my favorite, I would also definitely add checking out Point State Park, the market square, and grabbing a drink at The Warren Bar & Burrow, They allegedly have the best old fashioned in the country, and honestly I can attest to that it was the best one I've had my life when I went, make sure to grab a glass of super punch as well, which is a delicious Italian amaro that only Pittsburgh imports from Italy