Arirang is known as the representative Korean folk song (민요). When the New York Philharmonic Orchestra played a concert in Pyongyang last week, they played a version of this song for their finale. You can listen to it here: http://kr.youtube.com/watch?v=27oCLrSzDLQ.
One important aspect of Arirang is that there are many different versions of it, and each province in Korea has its version. The one played by the orchestra linked above sounds like this version: http://www.youtube.com/watch?v=7FlXH9CGnvw&fmt=18. I'm not sure where exactly that comes from, but it seems to be the most popular nowadays.
There's also the Jeongseon Arirang, which is supposed to be the oldest version: http://www.youtube.com/watch?v=YBR980uFSJE&fmt=18
And there's the Jindo Arirang: http://www.youtube.com/watch?v=2F2mIpoUJ7M&fmt=18. I think this one varies a lot. That clip is from a movie called 서편제.
Here's one called the Gangnam Arirang. And it's performed by a male soloist: http://www.youtube.com/watch?v=U1MDBeCCpX4&fmt=18. He goes into the standard version at the end, though.
What do these songs make you feel?