If you are making a connection via the Seoul/incheon airport, you will find the transit tour of the DMZ an excellent way of seeing an "other world" attraction. There is probably no other attraction in the world like the DMZ. As a visitor, you will get to look in to North Korea from an observation hill, walk down or take a train into a tunnel that the North Koreans dug to "sneak attack" troops in South Korea, visit an emotionally moving museum, and walk thru a modern, ghost-like train station that South Korea eventually hopes will be a stop on a train line to the Hermit Kingdom. You can do this by booking a transit tour (allow six hours) while making a connection in the Incheon airport. Check out the website of the tour operator that we used--www.freedomtour.co.kr. My wife is claustrophobic, so she could not go all the way down into the tunnel. She loved the tour anyway because her father was a marine who fought in Korea all the way up to the Yalu river.
If you own or manage DMZ, register now for free tools to enhance your listing, attract new reviews, and respond to reviewers.