The Society for Photographing Relics of Old London's 112 photos of "Old" London (taken 1875-1886) is an amazing resource: https://www.royalacademy.org.uk/art-artists/search/works-of-art?works_associated_with=C17010

There's also a huge resource compilation of information about Great Britain's Royal Navy from the 1790s to post WWI (including vessels, medicine, history, manning, leave, punishment, the slave trade, pay scales and much more) here: http://www.pbenyon.plus.com/Naval.html

If you're interested in what people ate there's the New York Public Library's Menu Collection - 45k menus dating from the 1840s to the present, transcribed and searchable here: http://menus.nypl.org/