The Thames is the seventh borough of Syndicate's London: the river itself, its boats and its bridges. The Templar Edith Swinebourne controls it in 1868, and you win it the same way as the land boroughs, but there are no strongholds or factories to clear.
Riverboats carry goods between docks and markets, and the water is badly polluted by industry, so hopping across moving boats is often the better way over. London Bridge, Westminster Bridge and the other crossings link the north and south banks.
Henry Green asks the twins to deal with Captain Hargrave, who patrols the river and sends people to the bottom of it. With the Thames Templars gone, Swinebourne's gang war decides the borough; killing her in Gang War: The Thames ends the Blighters' hold.
In the Jack the Ripper expansion Evie sails downriver to the prison hulks at Deptford in the memory Prisoners to free the hostages Jack keeps there.
Victoria station
Victoria station is a Westminster railway terminus south of Buckingham Palace. In Double Trouble, Jacob comes here after Catherine Gladstone, who is under guard, while gathering invitations to the Queen's ball.
Buckingham Palace
Buckingham Palace is Queen Victoria's London home in Westminster and the setting for the climax of Syndicate's story, the Queen's ball. It is also where the Queen hands out the Operation side memories, and it has a viewpoint.
Lambeth
Lambeth is the quietest of Syndicate's boroughs, a stretch of low houses, markets and works on the south bank across from Westminster. The Templar Cletus Strain runs it in 1868, and it is home to Lambeth Palace and the Lambeth Asylum, where several major memories take place.