Bidston Hill is 100acre of heathland and woodland that contains historic buildings and ancient rock carvings. It is located on the Wirral Peninsula, near the Birkenhead suburb of Bidston, in Merseyside, England. With a peak of 231ft, Bidston Hill is one of the highest points on the Wirral.[ The land was part of Lord Vyner's estate and purchased by Birkenhead Corporation in 1894 for use by the public.BuildingsBidston WindmillBidston Windmill replaced a wooden mill that was destroyed by fire in 1791, and was used to grind wheat until about 1875. However it is believed that there has been a windmill on this site since 1596. After falling into disuse it was bought and restored from 1894. It is open on the first Saturday of each month from April to September, between 10:00 a.m. and 12:00 noon.Bidston ObservatoryBidston Observatory was built in 1866 using local sandstone excavated from the site. One of its functions was to determine the exact time. Up to 18 July 1969, at exactly 1:00 p.m. each day, the 'One O'Clock Gun' overlooking the River Mersey near Morpeth Dock, Birkenhead, would be fired electrically from the Observatory. In 1929 the work of the observatory was merged with the University of Liverpool Tidal Institute, being taken over in 1969 by the Natural Environment Research Council. The Research Council relocated the Proudman Oceanographic Laboratory to the University of Liverpool campus in 2004.]