A few days ago, after work, I did a few nice trail walks and went into the Kaʻu desert in the backcountry of Hawaiʻi Volcanoes NP. I was scouting some locations for future night sky photography.
The whole trail was across lava, with a few black ahu (cairns) now and then. Back after dark, it was fun to navigate with the stars' help, as no trail was visible at all. I was amazed that I basically walked parallel to the trail and only ventured off a few times for a few hundred feet.