There are numerous ways to get around South Korea, but the best depends on where you go. If you are traveling from one city to another that's really far away from each other then the subway and the train would be the best choice. Some people even go on planes since South Korea has plenty of airports. If you are getting around in cities then a bus or a taxi should do the job. There are also ferry boat rides to get across water. One unique thing South Korea has is T-Money Cards. They are rechargable cards for paying for a bus, subway, and etc. They can be purchased at any subway station booth for ₩3000 ($2.57).