On my trip to South Korea in 2001, a trip that lasted only 2 weeks, I visited the country's all 8 WHS. And a number of other nice places - the distances within South Korea aren't that far, and it's an easy and rewarding place to travel in. Two of these sites now have become a WHS in 2010: Hahoe Folk Village and Yangdong Folk Village.
The bus ride to the Hahoe from Andong takes only 35 minutes. The very well preserved village "Hahoe" appeared still in deep rest when I approached. At the town's entrance is a ticket gate, otherwise, it is an ordinary village. The weather was wonderful, the town smelled just how a rural site should (after manure). A wonderful quiet place. Almost all of the thatched roof houses here are still occupied, so it's not possible to look inside them.
Hahoe is especially known for its mask dances. From the village, it's a 2-kilometer walk to the Mask Museum. About 200 Korean masks are exhibited: a glimpse into the folk history of this often so westernized country.
I also visited Yangdong. This village is located near Gyeongju. I was the only passenger on the local bus, and the driver dropped me at a crossing from where I had to walk another 1.5 km. However, a car stopped after a few minutes and gave me a lift - that happened so often in Korea!
There was no entrance fee to be paid in Yangdong: it was just a peaceful and very quiet village. Also less accessible than Hahoe, without a map or a guide. So I just walked around for an hour or so before returning to the bus stop.
At the time I surely wasn't aware of visiting possible WHS, but I always do have a soft spot for these "folk villages". So I'm happy that I see them rewarded WHS status in 2010!