| Category | Depressions | ||
| Continent | Brucrumus | ||
| Region | Lands of Purity, Onvorn | ||
| Built | 5 Brighstar 1941 DE | ||
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Tara-Har is a colossal crater located in the northwestern reaches of Adellum, on the far western edge of the ever-expanding Sinarag wetlands. The crater's mouth, spanning 30 miles in width and 18 miles from north to south, plunges 2,000 feet into a crater lake. The brackish waters of Sinarag cascade into this deep lake through hundreds of roaring waterfalls. Constructed during the Dawn Era, Tara-Har was established as a containment measure for the Radullu Creep. It serves as an instrument of equilibrium, drawing in such vast volumes of water that the lands to the east would have otherwise become akin to the treacherous Troll Bogs. Somewhere within the lake's murky, magic-infused depths, Tara-Har conceals a hidden rift. This inter-system rift channels water and alien vegetation back to the world of Throndar, completing the circuit that originated at the Radullu Rift.
Tara-Har's lake features four tunnels leading into the Underdark sector of Igreshand. Three of these are watery passages that converge to form the headwaters of the Black Spiral, an Underdark river serving as a trade route between the surface and the Onvorn Underdark region. These tunnels were constructed during the Second Epoch. Despite warnings and threats from the Nature Protectorates, the Farinteen Dynasty built them as trade routes with the peoples along the shores of the Ebonmurk. The formidable druids of the land could not deter the excavation, and the Nature Protectorates ultimately decided to collaborate with Farinteen's engineers, ensuring their work did not undermine the reasons for creating the crater.
In the Athenian Crusade (1539 - 1551), rather than losing one of their most powerful and sinister weapons, troops of the Black Tide jettisoned a Squealer of the Abyss into Tara-Har's crater lake. Even with the waters magically darkened, divers ventured forth in search of the item. Numerous individuals descended, most concluding that they had plummeted into the lake's mysterious hidden fissure, now resting mired on another world.