thumb|right|Adventdalen, west to east, seen from above Longyearbyen Adventdalen () is a valley on the island Spitsbergen in Svalbard, Norway. The river that runs through the valley, Adventdalselva, flows into Adventfjorden just outside Longyearbyen. Adventfjorden is an arm of Isfjorden.
thumb|right|Adventdalen, west to east, seen from above Longyearbyen Adventdalen () is a valley on the island Spitsbergen in Svalbard, Norway. The river that runs through the valley, Adventdalselva, flows into Adventfjorden just outside Longyearbyen. Adventfjorden is an arm of Isfjorden.
The valley ends at Haugen in Longyearbyen, close to the University Centre in Svalbard. The valley originates from the mountains Slottet and Tronfjellet, at the glaciers Hellefonna and Drønbreen. It runs westwards towards the fjord. From northwest, the branch valleys are: Mälardalen, Helvetiadalen, Eskerdalen, Janssondalen, Foxdalen, Bolterdalen, Todalen and Endalen.
2 mapped locations
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).