Cerin Amroth was the mound of Amroth, where Elanor grew, that stood in the heart of Lórien and held the house of that king before he was lost. It was here that Aragorn and Arwen plighted their troth centuries later, and it was here where Arwen, after Aragorn's death, went to die and was buried in FO 121.
The Fellowship of the Ring stopped at Cerin Amroth as they journeyed through Lórien. Frodo Baggins and Sam Gamgee followed Haldir up to the flet built in the center tree while the others rested in the grass. Frodo saw Caras Galadhon from the flet. When he went back down the hill, he saw Aragorn as he had been there in the past, young and clothed in white, speaking in Sindarin to Arwen.
Cerin Amroth had two circles of trees growing on it, the outer circle of trees with white bark and the inner of Mallorn. When the wind blew through the branches, the sound of far off seas and the cries of extinct sea-birds could be heard. Niphredil grew in the grass, as well as Elanor.
- The Atlas of Middle-earth pgs. 130-1