Where? 53–64 Chancery Lane, London WC2A 1QSWhat? It's not a museum per se, but you might as well treat it like one! Opened in 1876 as a storage unit for household silver, jewellery, and documents, it became the main spot for silver dealers in London in the early 20th century. Still the biggest silver store in the world, it attracts a lot of tourists. And no wonder! The views are spectacular.How much? Free!