Public Park
Walk through America's History. Nice way to view a good portion of the city.
Breathless view of history. Check out the Map Room Lounge.
Book store and tea house (reservation needed for the cafe)
For those with little ones
Hiking Trail
Prefect to bring in Halloween. I have several recommendation for food and places to see and things to do.
Good food, nice area to walk around also The Harvard Museum of Natural History is near by.
Italian Restaurants