31. Is still annoying me and no one else seems to be trying, so I'll write out my thinking as usual. Maybe it'll help someone?

1. The big green arrow has represented "Over" in a few examples.

2. The pic looks like a church, I assume it's famous... I think I've seen it in a movie before. Church = Chaple = Abby = Monastery

3. N21 Southbound appears to be a railline in the US and a highway in Ireland.

4. I keep thinking singular in reference to number 3 would mean "Lane".