In Antarctica or the Arctic, one or the other, when it's the summer and it's light all day.
where and when can you see the midnight sun
If you mean the land of the midnight sun, that would be the high latitudes, where in mid summer the sun does not sets. You can still see the sun at midnight.
No
Finland
Alaska.
Lapland is known as the Land of the Midnight Sun because at the height of summer, as the sun approaches the horizon, it creeps back up, so viewers can see the sun at midnight.
Scandinavia
june
Scandinavia
Norway, or anywhere above the Arctic Circle. During summer, the sun never sets, therefor, you see the sun at midnight.
In the United States, Alaska is the place to see the midnight sun during the summer months. In other countries, any nation near the Arctic Circle is a good candidate.
The Norwegians will see the midnight sun during the month of June. The length of day light can be more than 20 hours.