Major navigable rivers include the
Humber,
Mersey,
Yorkshire Ouse,
Severn,
Thames and
Trent. Some minor navigable rivers may be classified as
canals. Others include the Warwickshire
Avon, the Bristol
Avon. There are also the
subterranean rivers of London, and the
Jubilee River, which, although man-made, was designed to look and act like a natural river rather than a canal. ==Canals in the United Kingdom==