Hmm, now this one's a thinker... and Roland has to be in the scene as well...I take it these are our own personal memorable moments, rather than ones we think
should be classed as memorable?
I don't think I'd actually pick the ending to be honest...of course it's memorable, but I think there are others that spring to my mind before that:
- The beginning of the Waste Lands is one of my favourite parts of the whole series, with the fight with Shardik the Bear and then the shooting of the smaller robots that 'lived' with it.
- Eddie's death is certainly one of the more memorable moments, purely because it's so sudden and quite unremarkable...just when they think they have won, Eddie gets shot -- as I said, it's so abrupt and quite unexpected.
- The fight between Roland and Eddie and Enrico and his men is a very memorable scene as well.
With a series that's as long and as packed full of fantastic moments like The Dark Tower, there are probably a thousand more scenes I could mention...however, you did ask for the most memorable and they are the three that leap immediately to the front of my mind. I'll probably remember loads more soon, though.
