Just thinking of more things to see/places to go in Baltimore, we can also take in Cylburn Arboretum - it is a 176 acre park centered around an 1880s victorian mansion. The arboretum is run in a public/private partnership to showcase and preserve american horticultual traditions. There are acres of greenhouses, and displays of many kinds of gardens, featuring new and antique varietals. Cylburn is at least a half-day excursion in itself.