This optional tour was arguably the most enjoyable part of our Da Nang and Hoi An trip. Our guide, Thi, spoke in Japanese and explained the highlights and history of Marble Mountains in an easy-to-understand way. Although I had almost no prior knowledge, listening to her explanations made the experience so much more enjoyable. Despite booking at the last minute, she provided incredibly thorough guidance and took many wonderful photos. Thanks to her, it became a truly memorable part of our trip. If I ever have the opportunity to visit Vietnam again, I would definitely like to request Thi as my guide again. Thank you so much! This was the highlight of our Da Nang and Hoi An trip and the tour that made us feel the most immersed in the local culture and history. Our guide, Ms. Thi, spoke excellent Japanese and provided detailed explanations about the Marble Mountains, their history, and their significance. We joined the tour with very little prior knowledge, but thanks to his informative guidance, we enjoyed the experience far more than we would have on our own. Despite our last-minute booking, he guided us with great care and kindness. He also took many wonderful photos for us, which became some of our favorite memories from the trip. If we visit Vietnam again, we would definitely like to book another tour with Ms. Thi Thank you very much for making our trip so special!