UK Mega 2021: Lincolnshire
LLL: Knights of Old
A series of puzzle caches each involving substitution ciphers. Once all the puzzles have been solved you should find that you have a circular walk of about 4 mile, mostly along footpaths and fen roads, there is a short stretch along a busier road but there is a good footpath. There are a couple of styles, and at the time of placing there was no livestock.
Did you know that there is the remains of a Knights Templar preceptory tower not far away at Temple Bruer?