What are Mercedes Jackson's current travel statistics and records for visiting the Seven Wonders of the World?

Based on the available content, Mercedes Jackson has visited three out of the Seven Wonders of the World, with Petra in Jordan being one of them. She has expressed her intention to visit all seven. However, the specific details of the other two wonders she has visited are not mentioned in the retrieved content.

Would you like to know more about her experience in Petra, Jordan? Or perhaps you're interested in her travel tips for visiting such iconic sites?