Mount Seleya (2285).
Mount Seleya is a sacred mountain on Vulcan, where Surak discovered his philosophy of pure logic in the 3rd century CE. Located at the far end of the Vulcan's Forge, it is where rituals such as the Kahs-wan and Kolinahr take place.
Surak began the story of the IDIC or "Infinite Diversity in Infinite Combinations" on this mountain. Surak later died here from radiation poisoning, after the final battle between his followers and "those who marched beneath the raptor's wings." That enemy would apparently leave Vulcan and become the Romulans. (ENT: "The Forge", "Awakening", "Kir'Shara")
In 2285, venerable high priestess T'Lar supervised Spock's fal-tor-pan ceremony on Mount Seleya. (Star Trek III: The Search for Spock)
The T'Karath Sanctuary was located roughly 37 kellicams south of Mount Seleya. (TNG:"Gambit, Part II")
The Vulcan ship Seleya was presumably named in honor of this mountain. (ENT: "Impulse")