Exterior front view of the Old Royal Naval College with students walking around the courtyard in Greenwich, London, UK, July 2023

old royal naval college front view exterior greenwich london courtyard people walking architecture historic british landmark summer columns public space exploring tourism uk iconic building urban travel destination heritage site city life classical architecture london attraction urban design tourists students campus historic site sightseeing local landmark outdoor activity british history cultural site urban scene pedestrian area historic building heritage city exploration london architecture neoclassical historic monument educational site city tour famous building