Practically every bookstore in the country offers a selection of poetry — but if you're serious about the form, there's really only one place to go. Opened in 1927, Grolier Poetry Bookshop is the oldest continuously-operating poetry shop in the U.S. This Harvard Square institution has welcomed a number of notable authors over the years, including E.E. Cummings, T.S. Eliot, Allen Ginsberg, and Robert Creeley, and currently offers over 15,000 volumes of trade, small press, and university publications, as well as tomes on prosody, poetry markets, and spoken word CDs.