The Summer Palace is a vast ensemble of lakes, gardens, and palaces in Beijing. It was an imperial garden in the Qing dynasty (1644 to 1912). UNESCO added the Summer Palace to its World Heritage List in 1998. The Stone Boat, a lakeside pavilion on the grounds of the Summer Palace in Beijing, is 36 m long; it replaces an original wooden boat that burnt in1860. The new structure is also wooden and sits on a base of large stone blocks. The wood is painted to imitate marble and displays an imitation western-style paddle wheel on both sides.