- See the Prime Meridian: The Prime Meridian is the longitude that divides the world into the Eastern and Western Hemisphere. The Royal Observatory Greenwich is home to this extremely important point.
- Astronomical significance: Before the Royal Observatory, there was no standard way of measuring time. It was only after the establishment of Greenwich Mean Time, that the world got a universal measure of time.
- Amazing clock collection: The Royal Observatory Greenwich has an amazing collection of clocks! Their collection includes historic timepieces that have revolutionized the way we record, measure, and keep track of time.
- World Heritage Site: The Royal Observatory Greenwich is a part of the Maritime Greenwich World Heritage Site since it is an incredibly important part of maritime history.