An old photograph from the Finnish Defence Forces' photo archive occasionally resurfaces on social media, largely because of how eye-catching it is. Taken by Finnish photographer Osvald Hedenström, the photo shows a type of camouflage used by Finland during World War II, to disguise the road from Soviet forces. The trees would not hide the road from aircraft, Atlas Obscura explains – but anyone looking a the area from a watchtower would see an uninterrupted line of trees. From ground level, of course, it looks like a lot of flying trees, which if anything is more suspicious than a road....