Leaves from the Hyatt Regency Baltimore on the Inner Harbor lobby at 2 p.m. and returns around 4 p.m. Guide: Ira May, ERT, Inc The route was selected to illustrate a variety of building stones in a small geographic area near downtown hotels. This two hour walking tour ends with an optional stop at the Pratt Street Ale House This brew pub is famous for its English style ales and is a couple blocks from the hotel. You may download a PDF version of the brochure at http://www.mgs.md.gov/esic/publications/download/walktour1.pdf.