Photo: The Northern Lights glow green

105 of 388
Tromsø, Norway

credit: Mark Robinson

105 of 388

This photo was taken in Tromsø, Norway. A Northern Lights observatory was founded there in 1927. In the late 1800s, the city served as the starting point for many explorers setting out on Arctic expeditions.

Do you want your photo of the great outdoors featured on TreeHugger? Join the TreeHugger Photo Pool on Flickr and add your photos to the group!