High Street Tunnel, 510m (560 yds) long, on the Louth to Bardney line, passes under Caistor High Street (B1225) and comes between the former stations at Donington on Bain and South Willingham.
Interested in Lincolnshire's history and heritage? Join SLHA: special subscription offer up to 31 March.
Enthusiasts are needed to help run our society and our Lincoln bookshop
This new group aims to record Lincolnshire's vernacular buildings, with emphasis on the medieval and early modern periods
Discover the industrial history of Lincolnshire: mills and maltings; drains and docks; farms and factories.
Learn about Lincolnshire's rich and varied archaeology, especially in the Roman, Viking and Anglo-Saxon periods.
Find out about the places, people and events in Lincolnshire's colourful past, and how to uncover the story of your own village.
Over 1200 photographs - new and old - of buildings and scenes from across the county.
Milestones in the society's 160-plus years of energetic history