- What you can expect -Ready to be in two places at once? Stand with one foot in the eastern hemisphere and one in the west at London's Royal Observatory in Greenwich. At the home of space and time, you'll learn all about the Greenwich Meridian Line and GMT, and how it was chosen to be the Prime Meridian of the world back in 1884! You'll hear stories of astronomy, space and the stars, and you might even leave with fresh dreams of exploring the world.- Important Info -Child policy:- Children under 4 years are free of charge.- Children under 16 years must be accompanied by an adult.Good to know:- Check the official website for the daily opening hours and closure dates prior to your visit.- The interactive, multilingual audio guide can be downloaded on your smartphone using the Smartify App.