Last month I visited the Wren Library at Trinity College in Cambridge, luckily at a time the library was open to the public, and it was a Newtonian's dream! A case was pretty much devoted tohim, containing his walking stick, some of his hair, the actual prism he used to discover wavelengths and -- perfect for the bibliophile in all of us -- his personal copy of the first edition of hisPrinicipia Mathematica, complete with annotations in his hand that were incorporated into the second edition. And, while you can't go in, you can at least see from the outside the room heoccupied while he was at school there.

Jeff adds:

For more information on the Wren Library, see:
WREN LIBRARY (https://www.trin.cam.ac.uk/library/wren-library/)

For more information on Newton's work at the Royal Mint, see:
Isaac Newton : Warden and then Master of the Royal Mint 1696-1727(http://www.royalmintmuseum.org.uk/history/people/mint-officials/isaac-newton/#)
BOOK REVIEW: NEWTON AND THE COUNTERFEITER (http://www.coinbooks.org/esylum_v12n32a03.html)