T'raan or Ta'Raan is one of three active volcanoes located in the province of Raal on Vulcan, the others being T'riall and T'regar. Their locales were the three points of a triangle, at the base of which was situated the Fire Plains. (Last Unicorn RPG module: The Way of Kolinahr: The Vulcans; Decipher RPG module: Worlds)

the planet Vulcan (Ni'Var)
cities and settlements	AraKahr • Chi-ree • Da'kum'Ulcha • Da-leb • In-Yar • Ishaya • Isk'Kahr • Jaleyl • Jia'anKahr • Keldeen • K'Lan-ne • Khir Ahl • Kir • Kren'than • Kwil'inor • Le'Tenya • Naweeth City • Nekhie • Remsusala • Rh'Iahr • ShanaiKahr • ShariKahr • ShiGral • ShiKahr • SriKahr • SuraKahr • T'lingShar • T'Paal • Ta'Vistar • Vulcana Regar • Vulcinis • Xen'tal • Zayus
landmarks and institutions	Ancients of Days • Diplomatic Institute • Fal-lan-tral • Fort Aba'kur • Hall of Ancient Thought • Hall of Debates • Hall of Voices • Kolinahru Monastery • Kul'Cha'Vir • Ku'Vel'Di • Kurat Temple Complex • M'dai sensor dish • Monastery of Ulann • The Oasis • Raal Provincial Hospital • Sarek School of Diplomacy and Ambassadorial Studies • Serenity Square • ShiKahr Academy • Shrine of S'vec • Shrine of T'Vet • Surak Memorial • T'ralor Preserve • T'Karath Sanctuary • T'sar Museum • Tav'Sal'Nava • Tinsha Monastery • Te'Rikh • Temple of Logic • Temple of T'Panit • Temple of Amonak • T'Klass's Pillar • V'Shull Institute • Va'ne'meLakht • Vulcan Academy of Archives • Vulcan Archives • Vulcan Institute of Defensive Arts • Vulcan Science Academy
nations and provinces	Enclave of the Faceless Ones • Gol • Khomi • Kel Province • Kir Province • Lyr T'aya • Raal • Shi'al • Tat'Sahr • Tekeh Province • Xial
geography	Al-Stakna Mountains • Caves of Kolinar • Caves of Kulvir • Cheleb-khor Desert • Go'an Desert • Fire Plains • Harari Desert • Kendha-Ya • Kurat Mountain Range • Llangon Mountains • Mount Kolinahr • Mount P-Ta • Mount Tarhana • Mountains of Gol (Mount Seleya • Surak's Peak) • Nal'shin Valley • Na'ree • Pelasht • Plains of Gol • Plateau of Tai-la • Shival Flats • Ta'Valsh • Te-Vikram caves • T'Kallaron caves • T'raan • T'regar • T'riall • T'ralor Preserve • Valley of Everlasting • Viltan Flats • Vulcan's Anvil • Vulcan's Forge (Gateway • Plain of Blood • Womb of Fire) • Vuldi Gorge
continents and landmasses	Han-shir • Na'nam • Xir'tan
bodies of water	Great T'Kala Sea • Lake Yuron • Straits of Ha'zen • Thanor Sea • Voroth Sea