From modern skyscrapers and neon lights to Buddhist temples, palaces and pagodas, Seoul is a fascinating mix of old and new. A hub of business, culture and finance both within South Korea and internationally, Seoul houses the headquarters for some of the world's largest corporations. It also has one of the world's best subway systems - the easiest way to get around in this densely populated area. For the best view of Seoul, head to the tower on Namsan, one of the mountains encircling the city.