National Maritime Museum

An impressive building packed with maps, paintings of naval battles, and a collection of figureheads. The Forgotten Fighters Gallery explores the often overlooked naval and maritime elements of the First World War, with poignant stories and thought-provoking objects like the tiny altar cross that was made out of a bullet by a French soldier. As well as the main museum, this site also includes the excellent Queen’s House and Royal Observatory, where you can stand on the Prime Meridian of the World. As with all national museums, basic admission is free, but it’s worth paying to see the always-outstanding temporary exhibitions.