The cache you seek is a small and heavily disguised micro (verging on a nano some may say) hidden in a cunning but easily accessible location. Opposite the cache location is one of the few remaining and visible parts of the railway, what looks like a large bank is in fact part of the railway embankment along which the line would have run. As you walk south towards Woodhall Spa you may see some of the remaining concrete fencing posts now just quietly and lowly decaying but making convenient perks for the local bird life. Sorry it's not more exciting but you have to work with what you have.
Horncastle Railway Station
Horncastle station opened on the 11th August 1855 and was located on the lower southern side of Langton Hill. After World War 2 passenger numbers declined due to the increased popularity of road transport and in July 1952 it was announced that the passenger services would be withdrawn. This led to a two year long campaign that nearly succeeded in having the decision reversed but finally closure was announced for September 13th 1954. A freight service continued but that too was finally withdrawn on 6th April 1971.
A modern housing development now stands on the site with the only indication of a railway having been there being The Sidings, a gentle nod to the former use of the site. The old granary building which was rail connected still stands but is a shadow of its former self on Granary Way, from which the development takes its name. The only physical remnant of the station is a railway gatepost that stood at the entrance to the goods yard; this now stands opposite the premises of a local business fitting tyres.
Congratulations to collegerovers for their FTF.