Meaning ‘Altar of the Sun’, Rìtán ('rer-tan') is a real oasis in the heart of Běijīng's business district. It's a nice place to stroll and take in the atmosphere of this beautifully landscaped park where you'll see locals dancing, singing, flying kites, playing table tennis and hanging out. It dates back to 1530 and was one of a set of imperial parks that covered each compass point – others include the Temple of Heaven and Temple of Earth (Dìtán Park).
The Stone Boat, located by a large pond artfully strewn with rocks, is a good spot for a drink. There's also an artificial rock climbing area (per hour ¥30).