The Altazimuth Pavilion and the South Building were built between 1772 and 1897 and now house a collection of historical astronomical instruments and a planetarium.
The Peter Harrison Planetarium opened in May 2007 and features Europe's first digital planetarium projector.
2008 ticket prices: £6 adults, £4 children and concessions. Family ticket £16.00 (2 adults + 2 children or 1 adult + 3 children).
Before leaving the observatory grounds, look to the East to see Vanbrugh Castle. This castle, with its fairy-tale towers and turrets, lies just outside the park on Maze Hill. It was designed in 1719 by architect and playwright Sir John Vanbrugh (1664-1726) as his home.
When you've seen all you want to see of the observatory, proceed back down the hill. On the slope, keep a tight grip on strollers or prams. Or you can use the gentler slope in the handicapped route. As you come down back towards the Queen's House, you have a choice. If the children need more exercise, then proceed to the right to the Boating Pond and Children's Playground. If the children are tired, then veer to the left into the Greenwich shopping area for something to eat or drink.
For more information on the observatory, visit the Royal Observatory website.
For more information on the Greenwich Park, visit the Friends of Greenwich Park website.
