One of my favorite international vacations was to the temples at Angkor in Cambodia. What made it particularly enjoyable was my private (and inexpensive) tour guide, Vanny Chhim. Vanny is knowledgeable about the entire area around Siem Reap, and he is fluent in English. What makes him special is that he has kept in touch with me for the last three years via email, sharing his experiences and family life. I've never had any other tour guide do this. If you're looking for an enjoyable private excursion on his tuk-tuk, contact him at email@example.com.