Exclusive Early Access: Royal Observatory & Prime Meridian

Get in before the crowds and enjoy an exclusive-access guided tour of one of Britain’s most famous historic buildings: Royal Observatory Greenwich. Our expert guide will bring the history of this fascinating place to life, including stories of how the Prime Meridian came to be in Greenwich, the search for longitude, and the creation of Greenwich Mean Time (GMT). The Royal Observatory is Britain’s oldest purpose-built scientific institution. It is famous around the world as the home of the Prime Meridian of the World. Our guided tours give you close-up access to the unmissable objects in our collection, such as the ground-breaking Harrison Clocks and one of the largest telescopes in the world. After your tour, take in one of the most breath-taking views London has to offer with one foot in each hemisphere as you stand astride the Prime Meridian of the World! Your entry ticket will be valid for the rest of the day, so you can continue your visit when the site opens to the public.