Don’t forget about St. Paul. Take a leisurely drive down Summit Avenue, from the Mississippi River to the Cathedral of St. Paul, and marvel at the nonstop manses (mostly Victorian) along the way. See the governor’s residence (1006 Summit Av., St. Paul), F. Scott Fitzgerald’s old apartments (593 and 599 Summit Av.) and railroad baron James J. Hill’s massive place (240 Summit Av.), which offers tours.