Black Marsh is a vast, swampy region in the fictional world of Tamriel, part of the Elder Scrolls series. It is primarily inhabited by the Argonians, a reptilian race known for their agility and connection to the marshy environment. The landscape is characterized by dense wetlands, towering trees, and a variety of unique flora and fauna. The region is often shrouded in mystery and danger, with many travelers avoiding it due to its treacherous terrain and hostile creatures. Black Marsh is also home to the Hist, a sentient tree species that plays a crucial role in the culture and spirituality of the Argonians.