The Li river is the most famous picturesque landscape of the country. Stroll on the bank of the river to admire unique karst hills. 

Besides I advice you to do a cruise on a regular boat or a bamboo boat to make the most of it. The best one on a regular boat is the one which goes from Yangshuo to Guilin and lasts 3 to 5 hour.

The bamboo cruise lasts 1 hour but unfortunatly the quality is not guaranteed.