The Temple of Heaven is a place where emperors of Ming and Qing Dynasties offer sacrifices to pray for a good weather and bumper harvest. The Temple of Heaven looks magnificent in a solemn environment. The northern part of the altar area is round in shape and the southern part is square, a symbol for "round Heaven and square Earth", as this was how ancient Chinese viewed the universe. Places like the Hall of Prayer for Good Harvests, the Hall of Imperial Zenith, the Circular Mound, the Imperial Vault of Heaven, the Double-Circle Longevity Pavilion, the Echo Wall, the Triple Sound Stones, and the Seven-star Stones are all must-sees for tourists in Beijing.