Heritage designations are in place to protect special and significant features of England's heritage.
Historic England (previously English Heritage) maintain the National Heritage List for England, which is the only official, up to date, register of all nationally designated sites in England. These designations include listed buildings, scheduled monuments, protected wrecks, registered parks and gardens, and registered battlefields, amongst other types. These protected sites are sometimes also known as Designated Heritage Assets. Further information about the designation process can be found here. There are sub-pages on that site which give more information on each type of designation.
The full National Heritage List for England can be viewed and searched here.