mjs

My vote is for Paris as well. Shorter train ride too.

AlessandraZoe

I could argue for either Paris or Amsterdam. The touring areas of both cities is quite concentrated, their transportation systems are top notch, and they are indeed beautiful in sun or rain.

When I took my elderly parents to Paris, they loved riding all the buses so much that they managed to go back to Paris on their own and did just fine. The sheer number of cafes in Paris is always a positive--Paris people-watching is our favorite activity. One big negative--the last time we were in Paris, getting into the major art museums was quite difficult, though. There were just so many long lines, even with art passes. Quite frankly, I'd talk her into using a rollator or a wheelchair for those in hopes that you'd get a bit easier, less tiring access.

A point in Amsterdam's favor is its English-speaking population, which makes travel so very easy. We enjoyed the tram system. Yes, I agree, the cyclists are dangerous, but we found our museum experiences there to be less stressful, probably because none of them are as all-encompassing as the Paris Louvre or d'Orsay. The Ann Frank House, though, is quite unmanageable for any kind of disability.
Of course, my husband would want to list as a positive that if your Nan likes a tipple, he observed an amazing number of nice healthy-looking elderly women knocking back alcohol at breakfast in Amsterdam.

I loved our stay in Brussels because we could use it as a base for daily train treks to other cities. We did daytrips to Bruges, Ghent, Antwerp and close-by Leuven. We stayed near Grand Place and departed daily from the Brussels Central Station. That area wasn't hilly; however, even nearby museums often involved inclines.

I so hope you get to make this trip. It's such a thoughtful thing to do.
AZ