The brain is an amazing GPS device.
Whenever you come to a split in the trail or to some other notable landmark, walk a few feet further, turn around, note what it will look like on the return leg (if you're not doing a one-way hike), plug into brain. Done. Also known as paying attention to your surroundings or self-reliance (opposite of gadget-reliance).

CaT

If future generations are to remember us with gratitude rather than contempt, we must leave them more than the miracle of technology. We must leave them a glimpse of the world as it was in the beginning, not just after we got through with it.
- Lyndon Johnson, on signing the Wilderness Act into law (1964)