大唐西市博物馆

This guide to the Great Tang West Market Museum in Xi'an starts with a question: what was still down in the old well when archaeologists finally reached the bottom? It walks you across the glass floor built directly over Chang'an's Tang-dynasty marketplace, once busy enough to draw crowds of traders, including Sogdian merchants from as far as Uzbekistan and Tajikistan, hauling Silk Road cargo through wide carted roads. You'll hear about the wells, drains and wheel ruts still visible beneath your feet, and about the fire that eventually leveled everything standing above ground. Look down before you move on; the ruts are easy to miss.