I bought the entrance ticket for CNY15. The entrance ticket only gets you into the park. If you want to visit the building, you would need to pay another CNY20. You could purchase the combo ticket for CNY35. The interesting point about the Temple of Heaven is the architecture. There are 3 Main areas:
Hall of Prayer for Good Harvests
Imperial Vaults of Heaven
Circular Mound Altar
The Hall of Prayer for Good Harvests is a round building on a square platform. The Imperial Vaults of Heaven is surrounded by round walls. The Circular Mound Altar is of course a circle, on top of a square platform. The entire place is in a semi circle.
The interesting point in this place is the Echo Wall.
It is said that if 1 person whispers at one end of the wall, the other would hear it on the other end.
The Temple of Heaven Park is located in the Chongwen District, Beijing. It is China's largest and most representative existing masterpiece among China’s ancient sacrificial buildings. The Temple is divided by two encircling walls into an inner part and outer part. The main buildings lie at the south and north ends of the middle axis of the inner part. The most magnificent buildings are the Circular Mound Altar (Huanqiutan), the Imperial Vault of Heaven (Huangqiongyu) and the Hall of Prayer for Good Harvest (Qiniandian) from south to north.