Seoul is one of the most populous cities in the world, home to some 10 million people in the centre plus 25 million in the wider metropolitan area. And yet Seoul is not a city that overwhelms visitors. If you are looking for a diverse travel destination in Asia, the South Korean capital is the perfect spot. The city is well-organised and easy to navigate, nestled among mountains and steeped in history – a history found not only in museums but out on the streets, on city walls and in palace...