Of Course, it is possible to just take taxis all over Seoul. However, If you're planning to make this happen do ensure that you possess the title of your respective desired destination in Korean and/or an image if at all possible. Would it not be insane to start a running https://maps.google.com/maps?ll=37.50825,127.062392&z=16&t=m&hl=ko&gl=KR&mapclient=embed&cid=14330381119103493661