During the summer solstice, which countries can you travel to and experience extreme days and nights?

If you want to see the extreme day and night, you'd better go to a country near the North Pole. In several Nordic countries, northern Norway and northern Sweden, the sun never sets in July and August in summer, which is more obvious in Arctic cities, such as Tromso, the capital of Norway. If you don't want to go that far, you can go to our Mohe River, also known as the "city that never sleeps", but it is difficult to see the aurora because of the short daylight. I hope it helps you.