In 1980, Elaine Batchelor graduated from college. To celebrate, she decided to backpack across Europe. She was 22 years old and had never before traveled by herself. A few months into her trip, she got on a night train to Greece from what was then known as Yugoslavia. When Batchelor boarded, she realized that she was likely the only woman on the train and that no one spoke English.  "I thought, 'Well, this doesn't look like a good idea.' But at the time, when things weren't good ideas, I...