[ForHackernews]

Even in Europe Google Maps can be surprisingly bad. For example, in Portugal, their routing algorithm thought you could drive across the top of this dam. But when you get there, you absolutely cannot: https://maps.app.goo.gl/jBRNbeqZiY9cu8eL9 If you zoom out, you'll see it's quite a long detour to backtrack.

(I reported this mistake, and it seems to be corrected now)

[dizhn]

Could it be that motorcycles can drive there? I get routing errors where maps will show a turn where there's only a divider and a pedestrian size opening. I notice motorcycles taking a shortcut there though.