Seoul appears to have quite a few underground shopping malls and we came across the first of these in the subway tunnels around Dongdaemun station. The underground routes also provide a passage across the busy roads above.
The shops were varied although seemed to follow the formula shown in products sold generally in Dongdaemun Market. There were lots of shoe and clothes stores as well as utility shops selling accessories.
Without a proper shop space, vendors selling on the staircases down to such underground shopping malls were also common.
In February 2009, Mark and Linh moved from the UK to the Far East to spend 16 months living in Hong Kong and traveling around East Asia. This website documents their journey.