The Northern Lights or aurora borealis happen when solar particles hit Earth’s magnetic field and light up the sky in shimmering greens, purples, reds and blues. The stronger the solar activity, the more vivid and widespread the displays. Right now, solar activity is at its peak, which means more powerful geomagnetic storms and more frequent shows even further south than usual. Still, your best bet is to head north into the Arctic Circle for the most reliable sightings.

Iceland, a land of fire and ice, is known for its stunning geothermal spas. While the Blue Lagoon has long been a staple of tourist itinerar