Wow...again...
Such a wonderful and interesting post by @guyverckw sir...
Incheon International Airport is the largest airport in South Korea, the primary airport serving the Seoul Capital Area, and one of the largest and busiest airports in the world....

The airport has a golf course, spa, private sleeping rooms, an ice skating rink, a casino, indoor gardens, and a Museum of Korean Culture. Airport authorities claim that average departure and arrival takes 19 minutes and 12 minutes, respectively, as compared to worldwide average of 60 minutes and 45 minutes, respectively, ranking it among of the fastest airports in the world for customs processing.Its duty-free shopping mall has been rated the world's best for three years in a row in 2013 by Business Traveller. Incheon International Airport also claims that it has only a 0.0001% baggage mishandling rate...
I think this is unforgetable experince for you..