Walls without boundaries

An exhibition titled The Great Wall - Photographs Then and Now at London's Charing Cross Library features an iconic photo by William Edgar Geil, in 1908, showing two Chinese men sitting on the Great Wall in Qing Dynasty (1644-1911) clothes and long hair in braids.

Scholars have long hailed the Great Wall of China as unique, but a new photo exhibition on the spectacular Chinese fortification shows it has a little sister - Britain's Hadrian's Wall.

Currently exhibiting at London's iconic Charing Cross Library is a collection of about 50 photographs on the two walls, taken by archaeologists, scholars and travelers from both China and the West over the past 140 years.