How does the arctic nature trick your eye
The views in the wilderness are not always what they seem like at first.
"at least 5 km further than you think"
If you look at the distance from the top of the fell to the next one, it seems like a fairly short distance. In fact you can see hundreds of kilometres away with a clear weather and the place you are looking at is probably at least 5 km further than you think. Water has the same impact. Distances seem very short, like a few steps, even if the shore is 5 km away. When it is misty at the mountains, you might think you see your cabin ahead, but it turns out to be a tree. Every shape looks exactly the same in the blur. Even when it's bright, you might mix up a reindeer with a rock, if there is enough distance.
"depth is conceiving"
Ice makes it hard to separate a lake from a field, maybe even impossible, if you don't have any knowledge of the place. When it's summer and the waters of Lapland are very clear and pure, the depth is conceiving. If you think it is 2 m, you might as well double it. The heights are hard to realize in the terrain too. You might walk a few kilometres on a trail, that feels fairly flat, but you could end up 200 m higher or lower, it can be surprising. The hills still often turn out to be a lot steeper and harder to climb on, than they look like.
"impossible to spot"
Some of the animals blend in the terrain so well, it is impossible to spot them. When the leafs are still on the trees, with a little fall color on them, the fur of the moose blends in very well. As well as the light color legs blend in with the birch trees. If a moose is standing still in this kind of terrain behind a tree, it is extremely hard to spot. The willow grouse is also one of the smart ones. They change their outfit with the season, from brown to white. When it's full on winter, they are fully white. These birds lay on the ground, like they are one with it and may not even fly off, if you just walk by unnoticed. Of course there are other animals, that change into white too, like the arctic fox, the rabbit and the least weasel.
"they may actually be very different, than they look like"
If you look at any piece of space at the night sky long enough, it seems like they're moving, even though it is really you. The actually moving northern lights trick the eye with other ways, colors and distance. They might seem to be very close, but are probably 100 km higher than you. There are also a lot of colors, that sometimes show, but usually seem green. The human eye sees green tones easier, so they may actually be very different, than they look like.
For these reasons, I recommend sometimes taking your time in the wild and really looking around, it might blow your mind.