Laguna del los Tempanos is a lagoon situated just in the Andorra valley close to Ushuaia. It is a full dayhike within easy reach of the town itself and will bring you above the tree level and close to the highest mountain of the argentinean side of Tierra del Fuego, Cerro Vinciguerra. There is a small glaciar close by, possible to walk upon son some parts without danger. The hike follows the small river Arroyo Grande and soon climbs up into the mountains. There is another small lagoon close by Laguna Encanatada which can be visited too if you have enough stamina.