Longyeardalen is located between the mountains of Platåberget and Gruvefjellet. The town of Longyearbyen is located in the lower portions of the valley, which is named after the American industrialist John Munroe Longyear. The river of Longyearelva runs through the valley. At the top of the valley you will find the Longyear glacier which is about 4.5 km long.
See more photos of Longyeardalen here and from Longyearbyen here.