This interesting image was in a Guardian article describing and illustrating several of the most ancient pathways in England. Shown above is the "Sweet Track", "built nearly 6,000 years ago (3806BC) by early farmers who needed access to an island, the collapsed boardwalk was preserved in peat."
It was interesting to me because of the technique used to secure the planks - suggestive of more sophisticated engineering than the most common corduroy roads.
The other ancient paths at the Guardian link are also interesting for different reasons; the article is worth a quick browse if you enjoy walking.
Top image cropped for size from the original, credit Craig Joiner Photography/Alamy. Lower diagrams from Avalon Marshes.
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