Besides what you have, here are a few things that I'd recommend. Bromo Seltzer Tower
- If you got time on Saturday, I'd head over to the Bromo Seltzer Tower. It's like a 5 minute walk from the convention center. There are a bunch of art studios in the building and you can get a tour of the clock room at various times during the day. http://www.bromoseltzertower.com/open-studio-days.cfmB&O Railroad Museum
- I have a membership and love going here with the kids. There is an amazingly beautiful roundhouse here as well as a bunch of old locomotives. I'm not that big of a train guy, but I really enjoy going here. It is walkable to get here ~20 minutes. http://www.borail.org/Maryland Zoo
- It's a nice, very walkable zoo. It's nothing as huge as the National Zoo in DC, but they have some cool animals here and it's a great place. You could take the light rail there, but it's a bit of a walk from the closest station. I'd say taxi or Uber if you want to go here. http://www.marylandzoo.org/American Visionary Art Museum
- I've only been here once. It has quite the eclectic collection of art. Outside the building is cool to walk around too. It's within walking distance of the Inner Harbor. http://www.avam.org/Walters Art Museum
- I'm ashamed to admit, I've lived here for 17 years and haven't ever been, but I hear it is fantastic. Best part is that it is free to get into. So that might be fun. http://thewalters.org/
If you have a car and want to get out of the area, I totally agree with the recommendation to drive to Gettysburg, even think about stopping at Frederick, MD along the way. Annapolis is beautiful this time of year as well.
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Glad to have you coming out to our city and hope you enjoy yourself.