The harbor is about a 20 minute drive into downtown Baltimore. If your goal is to be within waking distance of the harbor and aquarium there are two Marriott's at Harbor East in the city that are much closer. There is also a Marriott near Camden Yards which would also be within walking distance. Parking in the city starts around 25 dollars a day around the harbor
It's an easy drive!
The drive from the Residence Inn is about 25-30 minutes to the harbor and aquarium
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