This London history site will only get better, and bigger. It currently uses pubs and their history, most are now closed, as landmarks.TFL status is here and the latest step-free map is here
The All-new Elizabeth Line (Crossrail) - now due to open late 2019 after delays. The eastern section is operational into Liverpool street.
Underground lines (with links to some detail on the stations):
I have split the lines to make the pages more web responsive, they are too large!