I didn't realise we had a British Museum connection, I must admit I always keep an eye out for things from WHS when I potter around every month or so. I will have a look and see if there is anything a little more substantive next time I go.
The one I toyed with was objects represented in the
cast court at the Victoria & Albert museum. I am a fairly recent convert to the V&A, having previously found it disjointed and dull. However when I discovered the cast court I was rather impressed. It basically has reproductions of art works and chunks of famous sites from all over Europe. They range from small plaques up to a copy of the whole Portico de Gloria from Santiago de Compestella cathedral (In fact it is actually easier to appreciate the sculptures on the copy than it is on the real thing).
I didn't want to propose it for fear of starting off a glut, but would happily have a trawl around for links.
I make it 23 (25 if you double count the Santiago Pilgrimage routes), ranging from Urnes Stave Church to the Vatican.