This morning, we leave the Pu Luong for about 3,5 hours drives south east to Ninh Binh, a province of astounding natural beauty with limestone peaks whose splendor is often said to surpass that of Halong Bay. Take a short drive to Trang An, board a sampan boat and start our journey for about 03-hour cruising along stream through some main grottos with beautiful stalactites and stalagmites (from 70 to 320 meters in length). Rowing from long dark-inside cave to green picturesque cannels, you are closest to nature. The complex Trang An grottoes is a gathering of 31 valleys, 50 cross-water caves, and home to 600 kinds of flora and over 200 kinds of fauna, many of them in the Red Book of Vietnam. Some of the caves are Toi (Dark) Cave, a 315-meter deep and dark cave, Sang (Light) Cave, a 112 meters deep lighter cave. There is also a 260-meter Nau Ruou (wine brewing) Cave, which, according to legend, has water that makes a delicious wine. Ba Giot (Three Drop) Cave, according to legend, grants a wish to those who catch three drops of water. While rowing through Trang An grotto in the quiet, fresh air of the highlands, with only the sound of birds and the oars stirring the clear water and surrounded by magnificent forested mountains upon which graze white goats, visitors enjoy a heaven on earth. After the cruise, you will be transferred to your lodge in Tam Coc. Spend the rest of the day at leisure. Overnight in Ninh Binh.