I was stationed at Osan AB, Korea from 2005-2006. It was a great experience and I would love to go back because I did not realise how easy it was to travel even though they speak another language. It wasn't until my last few months that I really got out there and saw what I could. The moral of the story is make the most of where ever you are.
Korean Folk Village
The Korean Folk Village was a great place to see the customs and traditions of the Korean people and the differences from all over the country
Bongeunsa
Bongeunsa ia buddhist temple that was built in 794. They have ceremonies and retreats that you can take part in. It is also located next to the COEX Mall. It suffered damaged during the Korean War.
Hangang River Ferry Cruise
Hangang River Ferry Cruise is a great way to see the Hangang River’s beautiful scenery, the surrounding islands, Jeoldusan Park, the 63 City Building, N Seoul Tower, Jamsil’s Multi Sports Complex, and other famous tourist spots.
Hwaseong Fortress
Hwaseong Fortress was a fortress not too far from Osan AB so one day I headed out to see it. It has parts dating from 1392 and others 1794-1796. It has four gates. It was damaged in the Koran War and restored in 1975-1979. It is also an UNESCO World and was one of the world's first planned city.
Namdaemun Market
Namdaemun Market is a great market in Seoul with something for everyone!
Namdaemun Gate
This is part of the the old city walls which were completed in 1398. It is in the center of a roundabout.
National Folk Museum of Korea
National Folk Museum of Korea has a great collection about the history of Korea and its people and is free to enter.
Karaoke
Karaoke in Asia is way different than it is in the US. In Korea and Japan, you rent a small room and sing amongst friends. I much prefer it this way as I am horrible!
Seoul Tower
Seoul Tower is a great place to get a view of Seoul. It previous was a TV station antennae and was later turned into a tourist attraction.
Freedom Bridge
This was the bridge that 13,000 POWs crossed after the signing of the Armistice Agreement in 1953. This generally tied with any tour that goes to the DMZ.
DMZ
When I went to the DMZ, only military personnel and their families could go there. They have a display and talk to explain to you about the history and the rules of your visit. This should be taken very seriously. As you can see in the picture they stand like that to make themselves less of a target. When you go inside the shacks, you are escorted because it is still a very hostile place.