The inner harbor has the aquarium, the science center, and also fort McHenry. There is an eatery downtown called Van gogh cafe
( or something similar) under the hechsher or Rabbi Tzvi Weiss. also there is a Me Late cafe in Hopkins hospital that is under the star K.
baltimore jewish life.com is the best bet for zemanim for tefillah.
also I think last week there was a suppliment in the Hamodia for things to do in Baltimore. Enjoy! Don’t forget to visit 7 mile market for all the food you might need.