What is this close-up picture? (WotsThat: Chimney pot texture (macro))

Question

What object is shown in this zoomed-in close-up photo?

GravityFox · Accepted Answer

Chimney pot texture (macro). Chimney pots were added to Victorian rooftops not just for looks but to cheaply increase the height of a flue, improving draught and helping smoke clear the roof more effectively than a flush chimney stack alone.

Answer: Chimney pot texture (macro)

More man made close-ups