Today's ride is split into two sections. The morning's cycle begins with a vehicle transfer to rural Dist for mountain biking. The road leads us to ride rolling hills and challenge some small hills, jungle, and pedal along the river. In the afternoon, the ride is on the country bac road,  through lush farmlands, rice paddies, small market on the gentle roads through eucalyptus, tiny town, and rice paddy fields to Da Dia reef. The area is about 100 meters wide and 250 meters long, composed of an estimated 35,000 columns of basalt rocks. The rocks are dark lava columns with roughly flat surfaces of different shapes - round, pentagon, hexagon, polygon etc. Ghenh Da Dia looks like a gigantic beehive or a pile of dinner plates, hence Ghenh Da Dia's name (The Sea Cliff of Stone Plates). These rock columns were created from volcanic eruptions millions of years ago; when the molten basalt flows met cold water, they solidified and shaped these rare polygonal formations due to thermal contraction effects. Then we carry on biking to seaside villages in the afternoon, and we continue cycling on undulating paths, through the sweet potato, tapioca plantation to Tuy Hoa city.