Finding Longitude
1 hour

The Finding Longitude Tour tells the story of the famous clockmaker John Harrison and his quest to solve the mystery of measuring longitude. You discover the political and technical challenges that Harrison was faced with to produce a clock that kept perfect time. We finish the tour beside his life's work, his clocks.

£7 per person, £5.50 concessions, under 14s accompanied go free

Minimum 10 people in a group. Prices exclude entry fees to the site.

For visitors with restricted mobility access between the National Maritime Museum and the Queens House and the Royal Naval College is along flat footpaths. However it is worth noting for those planning to visit the Observatory that there are are two paths to the Royal Observatory Greenwich from the National Maritime Museum through Greenwich Park. If you take the left fork you’ll head up a very steep hill to the entrance of the Observatory. At the top of the hill on the right are ornate wrought-iron gates which are usually closed. The entrance to the site is a short distance to the left through the central arch. If you take the right fork the path is slightly longer but less steep, taking you along ‘The Avenue’, a road that runs through the park and round the south side of the Observatory site. Follow this path around for 150 metres to the entrance on the north side.