On our trip back to Houston, from the Philippines, we had a 10-hour layover in Incheon Airport. So, being the adventurous (self-proclaimed) selves that we are, we decided to get a glimpse of Seoul, which was an hour away. We could have opted to go adventuring to the extreme by taking the rail, but we opted for the safer 5-hour day tour. We really did not want to miss our flight back, and we also wanted to avail of the airport's free showers before hopping on to the 11-hour long sitting.