Tiantan or more commonly known as the Temple of Heaven was the main intersection in worship between heaven and earth for more then five centuries in Chinese history. This amazingly laid-out park is massive (even for China standards) and contains thousands of trees, many of them over 800 years old. The three main buildings are the Altar of Heaven (where sacrifices would occur and the center was considered the center of the middle kingdom), the Echo Wall/temple (where a perfectly shaped circular wall allows for two ppl to talk to each other from opposite sides of the structure), and the Hall of Prayer for Good Harvests (a massive structure made w/o a single nail). Perfect day lead to some nice shots.