Current day kids Annie and Nico travel back to--ancient China to witness the construction of one of the most impressive architectural feats: The Great Wall of China. A system of walls and borders built to bolster the Silk Road and keep out intruders. Discover all the ins and outs of this gargantuan structure (in fact: it's comprised of 16 walls) with Nico and Annie as your friendly time-traveling tour guides. Who knows, their fun fact finding journey might lead them to outer space where they can still see The Great Wall if they're lucky! --Amazon.com.