If you ever really want to get away from it all and see something that you have never seen, and have an excellent chance of seeing something no one has ever seen, get in a sub.
일상을 떠나 뭔가 정말 새로운 것을 체험해 보고 싶으시다면 그 누구도 본 적이 없는 것들을 보시려면 잠수함을 한번 타보세요