Its awesomeness is threefold:
1) It's an ingenious solution to the snow-plow-knocking-over-the-mailbox problem: mount the mailbox on a spring! The elastic deformation of the spring absorbs the impact of the plowed snow, and the mailbox returns to its upright position once the snow melts or is removed. I've seen several mailboxes like this, so this photo is a tribute to all of them.
2) It's resourceful. The springs used for this type of mailbox all seem to have been salvaged from old pieces of farm equipment.
3) It's visible in the previous weather station photo.