Tower Hill is a London Underground station in Tower Hill in the East End of London. It is on the Circle line between Monument and Aldgate stations, and the District line between Monument and Aldgate East. Tower Hill is within Travelcard zone 1 and is a short distance from Tower Gateway station for the Docklands Light Railway, Fenchurch Street station for National Rail mainline services, and Tower Millennium Pier for River Services. The entrance to Tower Hill station is a few metres from one of the largest remaining segments of the Roman London Wall which once surrounded the historic City of London. A small section of this wall is visible above the track at the far Eastern end of the Westbound platform, near the ceiling. The station was built on the site of the former Tower of London station that closed in 1884. The present Tower Hill station opened in 1967 and replaced a nearby station with the same name but which was originally called Mark Lane, that was slightly farther west. In 2021, Transport for London made Tower Hill the tenth Underground station to replace some standard platform logos with 'poppy roundels' for the period leading up to Remembrance Day each year. Opposite the station in Trinity Square Gardens is The Merchant Navy Memorial commemorating merchant seafarers lost in the two World Wars and Falklands Campaign who have no grave but the sea. Its total of some 36,000 names is greater than that of any other Commonwealth War Graves Commission memorial in the UK.