English Heritage has compiled a photo archive showing images of more than 300,000 listed buildings across England. The penguin pool at London Zoo is among the structures featured.
The Images of England website features more than 80% of the buildings which were listed at the turn of the century, among them this beacon at St Martins on the Isles of Scilly.
Among the listed structures recorded are stately homes, churches, viaducts, castles, public toilets, signposts, signal boxes, clocks and this pillar box in Malvern, Worcestershire.
About 2,000 1930s phone boxes were listed in the 1980s, to protect them when they began to be removed from England's streets. These five listed phone boxes are in Middlesbrough.
London is the city featured most often on the Images of England site, while the most photographed county is Devon. This listed cabmen's shelter is in Kensington in west London.
Some 2,200 volunteers helped with the project, which received a grant from the Heritage Lottery Fund. This police box is at the Tramway Museum in Amber Valley, Derbyshire.
English Heritage estimated the photographers travelled more than 1.4m miles gathering pictures. This is the Gwennap Pit Methodist open air meeting place at St Day, Kerrier, Cornwall.
This half figure of the Marquis of Wellesley, Governor General of India, was originally fitted to HMS Wellesley and now stands near Chatham Dockyard in Kent.
This bandstand, near the north boundary in Barnes Park, Sunderland, Tyne and Wear, is on the site. It was built in the late 19th Century and has been listed since 1978.
Luton in Bedfordshire was known as a centre of hatmaking. This four-storey hat factory in Guildford Street dates from about 1900 and has been listed since 1981.
The East Pier lighthouse in Whitby, North Yorkshire. English Heritage said the archive would "really be appreciated by our grandchildren and great-grandchildren in years to come".