Cobblestones vs Setts. These two types of traditional road surfaces are often confused, but they're easy to tell apart. In this photo from the Applecross Basin on the Forth and Clyde Canal in the north of Glasgow, there are cobblestones on the left and setts on the right. Cobblestones are natural, rounded, irregularly-sized rocks, while setts are quarried and shaped stones, usually made from granite, of a uniform size and shape.

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Cobbled road surfaces are often older than those covered with setts, and the latter largely replaced the former during the 19th Century. As a result, cobbled surfaces are relatively rare in Glasgow, much of which was built after setts became commonplace. This may explain why these ones can be found alongside the canal, which was constructed at the end of the 18th century.

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