Sailaubai would explain to me that this fort was built by Macedonians from Alexander the Great's conquest of the region, but I cannot independently verify this. He also said those who controlled the fort could keep an easy lookout on the various traders moving through the valley to Langar or Wakhan, and take what they needed by attacking caravans.
June 5th, 2014 was one of the most visually amazing days of my life. I rode in a taxi with Svend, Helen, and our new driver, Saule Boy, from Murghab to Langar, Tajikistan. The day started with a view of the sunrise over Muztagh Ata of China, and ended with a sunset illuminating the Wakhan Corridor of Afghanistan. In between, we viewed some of the most amazing lakes, rivers, and, most importantly, mountains, I have ever seen.