Where The Sun Never Sets
Within the Earth's polar circles, the sun refuses to set for weeks or even months at a time. This bizarre phenomenon, known as polar day, keeps the sky bright well past midnight during the summer.
Because the Earth tilts on its axis, the poles are angled directly toward the sun for long stretches of time. While we expect the sun to dip below the horizon daily, these regions experience a constant, ghostly twilight that never darkens into night. Interestingly, atmospheric refraction bends sunlight slightly, allowing people to witness the sun even when it is technically just below the horizon. It is a surreal experience that completely shifts the rhythm of human sleep and local wildlife activity.
Source: Midnight sun