Chinese: 西湖公园 (Xī Hú Gōngyuán)
Getting there: Most buses from the city centre to Xī Zhàn (西站) stop on the south edge of the park. The main entrance is on the east edge, between Xījīn Dōnglù (西津东路) and Nán Bīnhé Lù (南滨河路)
Chinese: 五泉山公园 (Wŭquán Shàn Gōngyuán)
Location: South end of Jīngchāng Lù (金昌路)
Buses to 五泉广场 Wŭquán Guăngchăng: 2, 12, 18, 124, 149 (note: loads of buses stop at the 五泉山 Wŭquán Shàn stop, leaving you with a 10 minute walk south to get to the park. 五泉广场 Wŭquán Guăngchăng stop is much closer).
Entrance: 6 yuan
The best park in Lanzhou. You could easily spend a good 2-3 hours exploring the vast, tree-covered grounds on the lower-part of the hillside below Lanshan.
As well as the '5 springs,' trickling away in various places, there are Buddhist temples, a Sun Yat-sen memorial museum, tea houses, fairground and a zoo.
Chinese: 兰州水车博览园 (Lánzhōu Shuĭchē Bólăn Yuán)
Location: On the southbank of the Yellow River, 1 km east of the Huáng Hé Dàqiáo bridge (黄河大桥). Map here.
Bus: #135 from the Xiguan Crossing (西关什字, Xīguān Shízì)
Cost: 10 yuan
The display of water wheels here is much more extensive then the ones near the White Cloud Temple (白云观 Báiyún Guān). As well as several pairs of riverside wheels, there are also working models of various water-powered devices that farmers used for milling, and a culture park.
We found ourselves on Nánchāng Lù (南昌路) (map) with plenty of time on our hands, and decided to have a walk around the Bonsai Park (金城盆景园, Jīnchéng Pénjĭng Yuán). It was a hot afternoon, better suited to just sitting under a tree (which seemed to be the popular choice among the park-goers), but we did a full circuit. When we finally did stop to rest, there was a woodpecker hammering away on the tree above us.