4. The city's top museums and galleries are freeMany of London's top museums and galleries are free. This includes the Natural History Museum and Science Museum on Exhibition Road in South Kensington, and the Victoria and Albert Museum around the corner from here on Cromwell Road. Closer to the West End are the National Portrait Gallery on St Martin's Place behind Trafalgar Square, along with the National Gallery which is actually on Trafalgar Square. The famous Tate Modern is also free, while the most popular of all is the British Museum on Great Russell Street which has over 7 million artefacts.