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.