There was a mini museum in Incheon International Airport. This was an example how people could spend their time beneficially at the airport. There was a place where people could learn new things inside the airport building. Even though the museum was small, it was very informative and was done like a real museum.
Incheon International Airport is one of the best airports in the world. I guess one of the factors which has put it in a high rank is because of the museum.