Nemrut (volcano) of the earliest trade routes. Two eruptions of Nemrut were probably witnessed by people of Urartu, an ancient state located in the eastern Turkey. These eruptions occurred c. 787 BC (period of King Menua) and c. 657 BC (period of King Rusa II), and the latter eruption might cause the sudden disappearance of the city Uaiais located 30 km east of Süphan. In the 1980s, Japanese volcanologists studied the evolution of gases inside the caldera of Nemrut. They found that the ratio of helium isotopes He/He is 1.06, which indicates volcanic activity (most of the measured helium evolved from the
Mount Narodnaya conditions, crampons may be required. The south wall of Narodnaya is steeper and less commonly used to reach the summit. Mount Narodnaya Mount Narodnaya (also known as Naroda and Poenurr; ; "People's Mountain") is the highest peak of the Urals in Russia. Its elevation is . It is in Khanty–Mansi Autonomous Okrug in Tyumen Oblast, 0.5 km to east from the border of Komi Republic. The name refers to , which originates from the mount, located in the Research Range. It is the highest point in European Russia outside the Caucasus. This leads to its large topographic prominence of .