We had a layover in Seoul, Korea for 2.5 hours so we took the opportunity to step onto the "soil" of Korea for the first time in our life by going through the custom. It was only a short 30 minutes outside the airport. We hope to go further into a city when we are back next time during the return trip layover in August, when we will have a 6 hour layover.
The Korean Airline is one of the best airline we have taken so far with excellent Korean food, top notch entertainment system, and a comfortable leg room. Highly recommended.