I'll let most of these go without comment. Suffice it to say Seoul is vast, crowded, overdeveloped, and contains street after street of overwhelmingly huge buildings, bright lights, and wall-to-wall people.
This is a casino in Seoul. I was almost arrested for taking this picture--as in Vegas, it's a big no no. But I couldn't resist. The atmosphere in the casino was very subdued and quiet, unlike in America. There also wasn't a whole lot of winning going on.