Visit the Royal Observatory in Greenwich, home of Greenwich Mean Time and the Prime Meridian | Stand on the Meridian Line, explore Sir Christopher Wren’s historic observatory, and tour Flamsteed House | Enjoy hands-on activities, touch a 4.5 billion-year-old meteorite, and catch a show at the Peter Harrison Planetarium (additional charges apply) | Highlights include the Great Equatorial Telescope, Time Ball, and Shepherd Gate Clock