Portugal

License plate is yellow on the right side.

Some poles have partitions and holes in them . Note that Utility poles in
Belgium can also have holes in them. Also, crosswalk signs have belts on their waists(Image Source) .

Only Portugal uses yellow chevrons on a black background in warmer parts of Europe . If it looks cold, consider Iceland, Ireland, Norway, or Finland; if not, consider Luxembourg ( Map of European Road Curve Chevron Signs).

There are old cobblestone streets and sidewalks sometimes made of cobblestones .

古い街並みの場所にタイルを使用していない石畳が多い気がする。こんな感じの道路はブラジルにもある。