The water from Fallkill Falls runs into Fallkill Pool, past the Fallkill Bridge, through the Upper Pool and Lower Pool, where migratory birds rest and marsh and other water plants can be found. The Upper Pool abuts a dog beach, while the Long Meadow is adjacent to the Lower Pool. The water then passes under the Esdale Bridge, a footbridge over Ambergill Pond. The pond, and the Ambergill Falls just past it, was named by Olmsted and refers to the Old Norse word for "creek". After passing through Ambergill Falls, the water flows under Rock Arch Bridge and past the Ravine, entering the Binnenwater, which is named after a Dutch word for "within". The waters then cascade beneath the Binnen Bridge to the Lullwater, a small pond that contains the Boathouse on its eastern bank. The water then flows under the Lullwater and Terrace bridges to the Peninsula, which is managed both as bird sanctuary and recreational field.