The northern lights or Aurora Borealis. October, February and March are the best months to head to Scandinavia to see this natural spectacle. Gape in awe as greenish-yellow, red or violet lights curl and stretch across the midnight skies. The lights are never the same and can best be seen between 6 p.m. and 1 a.m., often reaching their peak around 11:30 p.m.