Recently I drove on a road not yet mapped on osm. As soon as I get back, I will add it. It made me wonder if every piece of land is already mapped, or if you could still have a bit of adventure, doing ...
Clearly scuba can only get you so far, and while we've discussed submarine tours in the past, they are just jaunts. What's the deepest you can actually go as a tourist, and what about if you were ...