The Knebworth and Winter Green Railway was a 1 ft 11+1⁄2 in (597 mm) narrow gauge railway built in the grounds of Knebworth House in 1972 as a tourist attraction.
In 1971, they started construction on a railway in the grounds of Knebworth House near Stevenage.
[1] The initial line was an end-to-end layout running from the house to the adventure playground.
In 1980, the track was extended to form a mile-long continuous loop.
During its existence, the line hosted a number of steam and diesel locomotives.