I highly recommend the Marble Mountains to anyone looking for a peaceful and beautiful place to explore. The natural beauty is simply stunning, and the history and culture of the area make it an even more special place to visit. The marble caves were formed through the clash between water and calcium carbonate walls, which took place cyclically over the last 6000 years. Hoi An Ancient Town has retained its traditional wooden architecture and townscape, with its original street plan, buildings backing on to the river, quays, canals, and bridges all remaining in their original setting.