The home of GMT
- Royal Observatory
- Meridian Line
- Cutty Sark
- Planetarium shows
- Free museums
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Visitor notice: On Sunday 4 March Cutty Sark and the museum car park will be closed for the Vitality Big Half Marathon. All other museums will be open as normal and DLR and rail links will be running. Find out about road closures
Visit the Royal Observatory in Greenwich, London. Home of Greenwich Mean Time (GMT), the Prime Meridian of the world and London’s Planetarium.
Explore the fascinating mysteries of time and space
Dating from 1675, Charles II’s Octagon Room is one of the few Christopher Wren-designed interiors that you can see in London today.
Royal Observatory Greenwich is a quick and easy journey from central London, by DLR, rail or boat