Even though the feeling is overwhelmingly tacky – think coloured lights, awkward commentary and boats full of tourists – there is something sublime about the water-borne cave expedition winding through 20 hills. There are add-on costs to be aware of, too: Tiger Cave (¥50) and the 'elevator ride' (¥50) between caves, both of which are kind of hard to avoid. Lónggōng is 23km south of Ānshùn and an easy day trip from there.
Local buses (¥10, 40 minutes) depart every 30 minutes from Ānshùn's east bus station from 7.30am. For the return trip, buses leave until about 5pm.