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.
There are libraries full of screaming children and strip lighting, and then there are libraries like The London Library. Whenever I’m there it’s hard to believe I’m not caught inside a wonderful dream, because everything about this place is so perfect as to be almost unreal.
Founded in 1828 the museum houses around 67,000 specimens many of which are now extinct or endangered. My favorite is the skull of a Bottlenose Whale from 1860.