Archive collection of surgical instruments - anatomy and pathology - dental instruments - medicine and surgery (basically a lot of dead things in jars, really interesting to draw from).
Not the most exciting place inside, but a lovely rooftop area which not all that many people seem to know about, 2 mins walk from Old St station. If it's packed then The Red Lion is just up the road.
The Royal Park offers great views of London and the city; As well as housing the Royal Observatory which includes a museum of astronomical and navigational tools, part of the National Maritime Museum.
I vaguely thought about leaving London recently and the British Library came to mind as somewhere I’d miss. It’s an essential resource because it has almost everything. It also has some interesting exhibitions.
This vegetarian south Indian is a bit of a hidden gem, good curry friendly staff very reasonable with bring your own booze doesn’t get much better than that.