K2 base camp trek is considered as the dream trek for mountain lovers. Starting from Askole village, this trek possesses not only the majestic landscape of Karakorams but also the centuries old stories. All the big Karakoram expeditions to K2, Broad Peak, Gasherbrums, etc have followed this route since many years. Concordia (6th campsite on this trek), also known as "The Throne Room of Mountain Gods" is the only place in the world that has 4×8000 m mountains at one place. If you want to experience the real world of mountains, then this is the trek you would want to take.