Ford of Bruinen
From the One Wiki to Rule Them All, the Lord of the Rings Encyclopedia.
The Ford of Bruinen was a method of crossing the river Bruinen.
At the beginning of the War of the Ring Frodo Baggins raced on Glorfindel's horse towards the Ford of Bruinen, with the Ringwraiths in hot pursuit. At the Ford Frodo, poisoned by a deadly wound, made his stand, and defied the Witch-king of Angmar. This lured the Ringwraiths into the Bruinen, and Elrond and Gandalf the Grey released a great flood, which took the form of horses made out of water due to Gandalf's magic. This flood killed the horses of the Ringwraiths and their physical forms, buying the Fellowship of the Ring some time.
