Its source is on the slopes of Gwanggyosan in Uiwang[1] and flows north, through the city of Gunpo, where a major cleanup operation saw several species of birds return to the area in 2005.

Seoul City Council has embarked on a programme of exclusive cycle path creation alongside its waterways, including the Anyangcheon, to be completed in 2010.

The part of the Anyangcheon that passes the modern day Geumcheon district was called Hannae in the book Donggukyeojiseungram, which was transcribed as 大川, meaning 'big river' in chinese.

The dominant fish of the river are Zacco platypus (freshwater minnow) and Rhynchocypris oxycephalus in the more upstream areas near the source, and Carassius auratus (goldfish) further downstream, by Gwangmyeong.

[3] The river also houses a number of species of birds, including the egrets, the grey heron, northern shoveler, common teal and mallard.