Calembel, also called Greenham, was a town of Gondor and the capital of the province of Lamedon. It was situated within a fenced field atop a small hill and lay along the river Ciril. A major road leading from Erech in the north to Pelargir in the south passed through the fords of the Ciril, which were near the town.
In the final years of the Third Age, Aragorn and the Host of the Dead camped here on their way to Pelargir.
In adaptations

In The Lord of the Rings Online, Calembel is the seat of Lord Angbor, who was charged by Prince Imrahil with protecting the land from the Corsairs of Umbar when the other Lords of Gondor rode to the defense of Minas Tirith. Deciding to make a stand against the Corsairs in Linhir, Angbor left his son Drambor in charge of Calembel, which served as a refuge for inhabitants of the nearby village of Lothgobel when it was attacked by the Corsairs.
References
- The Atlas of Middle-earth, p. 89
- The Lord of the Rings, Appendix B: "The Tale of Years", The Third Age, The Great Years