The 64th parallel north is a circle of latitude that is 64 degrees north of the Earth's equatorial plane. It crosses the Atlantic Ocean, Europe, Asia and North America.
At this latitude the sun is visible for 21 hours, 1 minute during the summer solstice and 4 hours, 12 minutes during the winter solstice.
64th parallel north Wikipedia
Starting at the Prime Meridian and heading eastwards, the parallel 64° north passes through: