The Yellow River 'Stone Forest' (黄河石林 Huánghé Shílín) is 145km north of Lanzhou (map). Take a bus to Báiyín (白银) from the East Bus Station, then change to a local bus, or negotiate a taxi (we paid Y120). Local farmers have rooms available for overnight stays. Trivia: Some scenes from the soon-to-be-released Mulan (花木兰) were filmed there (trailer). We were there on a very overcast weekend, so I put some black and white film in my camera (more colourful pictures). Photos here.