Greenwich Royal Park Greenwich London Greenwich Park is the oldest royal park in London which covers an extensive 183 acres and is one of the four World Heritage Sites in London. Greenwich park is also home to the old Royal Observatory along with other historic buildings. The Royal Observatory in Greenwich Park was founded on 22nd June 1675 and was used to find out the longitude of places which was believed would help with navigation. However, it was not until 1884 that the Prime Meridian was used in the rest of the world. Today, it is possible to do a guided tour of the Royal Observatory at Greenwich Park and see Prime Meridian Line and Greenwich Meantime. Other interesting buildings are the Queen’s House, the Old Royal Naval College and the Maritime Museum. Find cheap flights to London with eDreams. London Travel Guide | Parks and Gardens in London Leave a Reply Cancel Reply Your email address will not be published.CommentName* Email* Website Save my name, email, and website in this browser for the next time I comment.