Lorien

Warning: Wikipedia contains spoilers

Two places are known as Lórien, both exceptionally beautiful. The first is the gardens of the Vala Irmo in Valinor (he is sometimes called Lórien as well). The second is a forest in Middle-earth proper, where the exiling Noldor settled, and which, perhaps partly due to their magic acquired a unique beauty. This forst was called Lothlórien (Lórien of the Blossom) in memory of the Lórien the Noldor left behind; but the name was often shortened to Lórien. Other names given to the land include Dwimordene, The Golden Wood, Lindórinand and Lórinand.

Lórien is the only place in where the golden mallorn trees grow in Middle-earth, brought there from Valinor by Lady Galadriel. It is the wooded homeland of the Sindar, the Silvan Elves. It is located on the River Celebrant[?], southeast of Khazad-dûm.

After the disappearance of its Lord, Amroth[?], Galadriel and Celeborn came to Lórien and became its Lord and Lady.