The Narrow Gauge Railway Museum site explains:
In 1815 the Duke of Rutland built the Belvoir Castle Tramway in Leicestershire to carry coal and other supplies from Muston Gorse Wharf on the Grantham Canal up to the Castle. Wagons were pulled up the hill by horses. The route can still be traced and many of the stone block sleepers remain in place. A short section in the castle grounds survives and extends into the cellars beneath the castle.Lord Bonkers has asked me to point out that the railways on the Bonkers Hall Estate are far more impressive.