I agree that some NSA's could be used more effectively. We live in a very diverse part of the country with lots of points of interest which a lot of people know little about.
For example, on the Red Kite you could have something like:-
"The next stop is Winlaton Mill. Alight here for the Land of Oak and Iron Heritage Centre and Derwentheugh Park"
"The next stop is Rowlands Gill. Get off here to visit Gibside Chapel and Grounds."
"The next stop is Forge lane. Alight here to visit the historic Dovecote Steel Furnace - the first steel furnace in the world"
Which other services could benefit from PoI's added to the NSA's?