Possibly ad-hoc way finding, and reference points when lost, to help detect if you're going in circles, or if a change of direction is necessary. If there are

Possibly ad-hoc way finding, and reference points when lost, to help detect if you're going in circles, or if a change of direction is necessary. If there are N number of confusing junctions, it would require the same number of markings as a unique mnemonic device to register the steps to escape the confusing area, and jog one's memory of how directions were negotiated the last time.