The white inn building from the early 1980's Bob Newhart tv show opening scene is still there today, looking the same white color, and is located in downtown Center Sandwich, NH. Just about every building along the street is painted white.
The shot of the boat being steered into shore from On Golden Pond is where Big Squam Lake comes very close to Rt 25 in Holderness, along a piece of public highway access land that abutts the waterfront, a little bit west of the Squam Lake Sailing Association facility
www.squamlakes.org/ and about one mile east of the Citgo convenience store.