The 5th and final location of a recent day of solo exploring was this Grade II listed mid-19th Century lime kiln, hidden in woodland in the Norfolk countryside. Lined with brick and flint, and with two entrances and four chutes leading into the brick-lined pot. You can read a bit of the history of lime kilns and quicklime production in Great Britain at this wiki page. One of the entrances to the kiln. Inside the underground brick-vaulted chamber. What remains…