This is arguably the ultimate road trip on earth. Marco Polo did it. All the legendary Silk Road explorers did it. Traveling the Pamir Highway back to back, as a harsh winter approaches, able to appreciate it in full, in silence and solitude, offers not only a historical plunge into the intricacies of the ancient Silk Road but a glimpse of what the future may bring in the form of the New Silk Roads.

This is a trip steeped in magic ancient history. Tajiks trace their roots back to tribes of Sogdians, Bactrians and Parthians. Indo-Iranians lived in Bactria ("a country of a thousand towns") and Sogdiana from the 6-7th centuries BC to the 8th century AD Tajiks make up 80% of the republic's population, very proud of their Persian cultural heritage, and kin to Tajik-speaking peoples in northern Afghanistan and the region around Tashkurgan in Xinjiang.

Proto-Tajiks and beyond were always at the fringe of countless empires – from the Achaemenids, Kushan and Sogdians to the Greco-Bactrians, the Bukhara emirate and even the USSR. Today many Tajiks live in neighboring Uzbekistan – which is now experiencing an economic boom. Due to Stalin's demented border designs, fabled Bukhara and Samarkand – quintessential Tajik cities – have become "Uzbek."

Bactria's territory included what are today northern Afghanistan, southern Tajikistan and southern Uzbekistan. The capital was fabled Balkh, as named by the Greeks, carrying the informal title of "mother of all cities."