What is this close-up picture? (WotsThat: Whisky barrel wood grain (macro))

Question

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

ChalcedonyQ · Accepted Answer

Whisky barrel wood grain (macro). Whisky gets most of its colour and a large part of its flavour from the oak barrel it ages in rather than the original spirit, which is why the same whisky can taste noticeably different depending on which barrel it matured in.

Answer: Whisky barrel wood grain (macro)

More man made close-ups