In the short-lived time before Rhudaur fell beneath the sway of Angmar, there were three champions and a king who led the Men of Rhudaur with honour and justice. In the Arboretum, the three were interred in a place where the peaceful woods would watch over them and the people could visit them in quiet reflection.
The Garth Agarwen Arboretum was home to many important locations. These included the tombs of three of their champions: Fuirvaw, Hargram, and Halvegil, a statue to their first king, Nailion, and the founding stone that served as the marker for the bounds of their land: the Stone of Mingond.