One aspect I missed particularly at Greenwich was their collection of old instruments - astrolabes, sundials, monographs, clocks, drool-worthy old telescopes, filar micrometers and much more which I first saw in the late 1970's.
What's left on display is tragic and I can't help suspecting some stupid accountant flogged the collection off as worthless old junk.
And yes sorry I forgot the Herschel museum - I saw that in 2013. I'll add the stone circles at Avebury and
http://en.m.wikipedia.org/wiki/Easter_Aquhorthies