The Ancient Forest of Dorthonion

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Taur-nu-Fuin began its history as a majestic highland forest that crowned the northern reaches of Beleriand. The great pine woods stretched across the heights of Dorthonion, their sturdy trunks reaching skyward under the clean airs of the First Age. These proud forests stood as silent sentinels, their green needles catching the light of the Two Trees in the earliest days of Beleriand, before the rising of the Sun and Moon.
The forest lands formed an important part of the realm governed by the brothers Angrod and Aegnor, sons of Finarfin, who received this territory from their brother Finrod Felagund. These Noldorin princes established their dominion here after the return to Middle-earth, maintaining watch over the northern boundaries of the Elven realms. Under their stewardship, the woods remained a place of beauty and light, where the Eldar would walk freely beneath the swaying boughs.
The strategic importance of Taur-nu-Fuin could not be overstated, as it commanded the southern edge of the vast plains of Ard-galen. These grasslands stretched northward to the very gates of Angband, Morgoth's fortress, making the forest a crucial bulwark against the Dark Lord's forces. The highland forest provided an excellent vantage point for monitoring enemy movements across the plains, while its natural defenses made it an invaluable part of the northern fortifications of the Noldor.

Geography and Landscape

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The topography of Taur-nu-Fuin was dominated by imposing highlands and elevated plateaus, all shrouded in thick forest cover. The terrain rose steadily from the plains of Ard-galen, creating natural tiers and levels that added to its defensive capability. The steep hillsides were clothed in ancient pines, their roots gripping the rocky soil and creating an almost impenetrable barrier to those who would seek to breach the realm's borders.
Throughout the forest ran a complex network of paths and secluded valleys, hidden between the closely growing trees. These routes wound their way through the woodland, often narrowing to barely visible trails that could easily confuse those unfamiliar with the terrain. The valleys cut deep into the highlands, creating sheltered spaces that would later become treacherous pits of shadow and confusion.
The natural defenses of Taur-nu-Fuin were formidable, with sheer cliffs and dense woodland combining to create an almost impregnable fortress. The thick growth of trees created multiple layers of defense, while the rocky outcrops and steep escarpments made large-scale movement through the region extremely difficult. These features made the forest an ideal defensive position for the Noldor in their watch against Morgoth.

The Shadow's Corruption

The catastrophic battle of Dagor Bragollach marked the beginning of Taur-nu-Fuin's transformation into a place of darkness and terror. When Morgoth broke the Siege of Angband with rivers of flame and armies of Balrogs and Orcs, his malevolent power swept southward across Ard-galen, reaching into the highlands of Dorthonion. The forest, once proud and strong, began to succumb to the Dark Lord's influence as his servants took control of the region.
In the aftermath of the battle, an unnatural darkness began to gather beneath the trees of Taur-nu-Fuin. This was no mere absence of light, but a tangible darkness that seemed to possess a will of its own. The shadows deepened beyond natural measure, creating a perpetual twilight that made the forest nearly impossible to navigate safely.
The valleys and lowlands of the forest became filled with noxious vapors and foul air that collected like pools of poison. These toxic fumes lingered in the deeper reaches of the woodland, making many areas deadly to any who would dare to enter them. The clean winds that once swept down from the north no longer reached into these befouled depths, leaving the poisonous air to stagnate and grow ever more potent.

A Forest of Fear

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A supernatural dread took hold in Taur-nu-Fuin, affecting all who ventured within its bounds. This was no ordinary fear, but a magical terror that seeped into the minds of travelers, causing even the bravest warriors to lose heart and flee in panic. The forest earned its new name, which means 'Forest under Nightshade' in Sindarin, as even the Elves began to fear its depths.
The paths through Taur-nu-Fuin became treacherous beyond measure, seeming to shift and change of their own accord. Travelers would find themselves walking in circles, their sense of direction confounded by some malevolent will that dwelt among the trees. Even those who knew the forest well could no longer trust their memory of its ways, as the very landscape appeared to conspire against them.
In the deepest parts of the forest, the darkness gathered with such intensity that it seemed to take on physical form. These areas became known as places where shadow itself had substance, where the darkness could almost be felt as a tangible thing pressing against the skin. Few who entered these regions ever returned to tell of what they encountered in those lightless depths.

Flora and Fauna

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The trees of Taur-nu-Fuin suffered a horrible transformation under Morgoth's influence, their once-straight trunks becoming twisted and malformed. The proud pines bent and warped, their branches reaching out like grasping fingers, while their needles turned black and sharp. The forest itself seemed to become hostile to all life, as though the trees had been corrupted into willing servants of the darkness.
Throughout the forest floor, poisonous fungi and noxious plants began to flourish in the perpetual gloom. These unwholesome growths spread rapidly, producing foul spores and toxic vapors that added to the forest's deadly atmosphere. Many of these fungi glowed with an eerie, phosphorescent light that served only to make the darkness seem deeper by contrast.
The natural wildlife that once inhabited the forest gradually disappeared, leaving behind an unnatural silence that hung heavy among the trees. Birds ceased their songs, and even the hardiest animals fled from the growing shadow. Those creatures that did remain became twisted and corrupted, transformed into dark things that served Morgoth's will.

The Forest's Dark Legacy

The corruption of Taur-nu-Fuin left an indelible mark on the geography of Beleriand that would persist until the land's final drowning beneath the waves. The forest became a barrier between the northern and southern realms, a place that few would willingly traverse. Its presence affected travel routes and communication between the scattered realms of the Elves and their allies throughout the latter years of the First Age.
The tales of Taur-nu-Fuin's darkness and terror became woven into the songs and stories of the First Age, remembered with dread by both Elves and Men. The transformation of the once-beautiful forest served as a powerful reminder of Morgoth's ability to corrupt and destroy the natural world. These stories would be passed down through generations, influencing later tales of dark and dangerous woods in Middle-earth.
Taur-nu-Fuin stands as one of the most potent symbols of Morgoth's corruption of Arda, demonstrating how his malevolent power could twist and pervert the natural world. The forest's fate served as a warning of how even the most beautiful and secure places could fall to darkness if Morgoth's influence was allowed to take root. This lesson would be remembered long after Beleriand sank beneath the waves, influencing how later generations viewed the threat of evil to the natural world.