I have been to Kew more times than I can count, in order to visit the Public Record office (now the National Archives). But for some reason, I have never gotten around to visiting the Botanical Gardens.
That should be some sort of crime.It was a serene, beautiful experience, I highly recommend it during your next visit!
Funny--I feel the same way about doing research at the National Archives.

But I will definitely make time for the Gardens this summer.
