That would be Kent Falls in Kent, CT, and the chocolate shop is Belgique. About one hour south of GB on route 7.
Other touristy things in the GB area:
Chesterwood--home of William Chester French who sculpted the Lincoln Memorial
Tanglewood--Summer home of the Boston Symphony Orchestra
Jacob's Pillow--Dance venue
The Mount--Home of Edith Wharton, and they (or at least they used to) stage Shakespeare plays in the summer--google Shakespeare and Company
Berkshire Theater Festival--summer stock theater
Mass MoCA--Museum of Contemporary Art
Clark Art Institute--been a long time since my 5th grade field trip

but I think I remember impressionist works there.
Mom's favorite restaurants:
Pearl's on Railroad Street--a little bit of NYC in the "sticks"
The Brewery on Rte. 7 north of "town" more casual--burgers, etc. (I can personally vouch for the chocolate cake)
Suisse Hutte --this might actually be in NY State--it's on the property of Catamount Ski area which is right on the border. A little pricey but great for a special occassion
Red Lion Inn in Stockbridge--Famous country inn--Norman Rockwell lived across the street.