Fain is a ruin in the Shivering Isles, located on one of the peaks of the Jester's Spine Mountains. The ruins were once home to a group of Heretics who worshipped an unholy being known as Gyub. The Heretics sacrificed "volunteers" to Gyub by dangling them over the Pit of Fain (a root tunnel which drops vertically down the center of the mountain), reciting a prayer to Gyub, and dropping the sacrifice into the Pit, never to be seen again. There is no evidence of Gyub's existence; the sacrifices were likely eaten by the many beasts which lived in the root caves at the bottom of the Pit. In 3E 433, the Heretics here were preparing for an obscure ceremony that they called the "Rebirth", for which they needed a large amount of "volunteers" to be sacrificed. The ruins were cleared out later that year by Sheogorath's Champion.
Falinesti is the strange, walking city of the Bosmer king. It is located in the south of Valenwood during the summer, while moving north in the winter. The city occupies the branches of the largest great-oak in Valenwood, whose magic was created at the dawn of recorded history. The Camoran throne is located in the highest of branches, along with many Bosmer dwellings. Bosmer, Orcs, and Imga are its main inhabitants, with few humans having the nerve to remain in the city for long. During the Aldmeri Dominion, the Thalmor chose Elden Root as their capital instead of Falinesti. The city was once home to a gladiatorial team called the Wyverns.
Falkreath (sometimes called Falkrenth) is a town in southwestern Skyrim, close to the border with both Cyrodiil and Hammerfell. Just across the border in Hammerfell lies the town of Elinhir. At one point the city seems to have been counted as part of Cyrodiil. Falkreath was once home to a gladiatorial team known as the Dark Shadows.
In the first and second eras, Falkreath was one of several kingdoms making up western Colovia, but in the final century of the second era, the kingdom came to greater prominence under the leadership of Cuhlecain and his general, Hjalti Early-Beard or Talos - later to be known as Tiber Septim.
 Falkreath Hold
Falkreath Hold is a southern hold in Skyrim along the border with Cyrodiil and Hammerfell. It's the second southernmost hold in Skyrim, after the Rift. The capital is Falkreath; the abandoned settlements of Helgen and Neugrad Watch are also located here. Home of Skyrim's famous Pine Forest, Falkreath Hold is covered in a fine mist that makes the land seem without season. The mountains rising above Falkreath are well above the snow line, striking a stark comparison to the rest of the hold. The most distinguishing geographic feature is Lake Ilinalta, which covers a large portion of the central region and acts as the source for the White River.
The city is ruled by a king or queen, although the only ruler of whom any details are known is King Storig, who commanded the vanguard of the Imperial army at the Battle of Bodrum in 1E 2920 during the Four-Score War. Another, unnamed, king is known to have fought a war against Solitude and its allies some time late in the Third Era.
Firemoth is a region encompassing a ring of barren islands located in the Inner Sea. The islands often suffer heavy storms, and the bare volcanic rock provides little nourishment for flora. Hardy trama shrubs and stark, leafless trees can survive the ashen, bitter soil, and marshmerrow reeds flourish along the sandy beaches, but otherwise the islands are devoid of life.
The main island houses the ruins of Fort Firemoth. Once a strategic strongpoint guarding the Inner Sea from smugglers, it was overrun when an undead army led by the lich Grurn marched out of the ocean and captured the garrison, leaving few survivors. While still technically Imperial territory, the islands are still occupied by the skeleton army and have never been reclaimed. The fort was built on top of a rich ebony mine, which broke through into flooded natural caverns and an ancient Velothi tomb.
Firewatch is a snowy Imperial fort deep in House Telvanni territory, on the shores of the Sea of Ghosts. Located across the strait east of Tel Mora, Firewatch marks the northern tip of the mainland of the province of Morrowind. Firewatch takes it name from the vista of the giant volcano, Red Mountain. It was once home to a gladiatorial team known as the Blood Mages. Sigillah Parate's grandmother, a Witch of Molag Bal, was once sent by the Prince to poison the heir of Firewatch, but died in the act. During the Imperial Simulacrum the fort was at war with the neighboring city of Old Ebonheart, and was ruled by Queen Vaynth.
Firsthold is one of the main cities on Auridon, the second largest of the Summerset Isles. It's home to a great Orrery constructed out of celestial material, which was gathered by travelers to Aetherius in the Merethic Era. The great river Diceto passes through the royal parks of the city. The city is featured as the setting of the book The Firsthold Revolt. High Councilor and later Potentate Ocato of the Third Empire was born here.
 Lake Fjalding
Lake Fjalding is the largest lake on Solstheim, although it is covered by ice year-round. It is commonly used as a mating ground for the horkers of the island. The Iggnir River to the south and the Isild River to the north meet here, in the Felsaad Coast region due north of Fort Frostmoth. The Isinfier Plains lie to the south. The Thirsk mead hall is on the eastern coast of the lake, near the Lair of the Udyrfrykte.
For more information, see the main Lore article.
 Fort Frostmoth
Fort Frostmoth was the primary Imperial settlement on the south coast of Solstheim, in the Hirstaang Forest. It was established some time in the Third Era, after the Imperial discovery of the island. The fort acted as the area office of the East Empire Company, established on Solstheim to mine the rich deposits of ebony from Raven Rock, and was also the main link to Vvardenfell by way of Khuul. The fort was known among the legionnaires as a punishment detail, due partly to the unpleasant weather and partly due to the mead.
In 3E 427, during the fulfillment of the Bloodmoon Prophecy, the fort was attacked by werewolves sent by Hircine, who captured Captain Falx Carius to act as one of the Prey in the Hunt. The fort sustained heavy structural damage in the attack. Carius survived the ordeal and re-assumed command of the fort later that year.
In 3E 433, the Nords of Skyrim attempted to capture the whole of Solstheim and remove Fort Frostmoth. The Nords were successful in their campaign and Solstheim became a part of Skyrim, but the fort remained intact.
After the Oblivion Crisis, Dunmer refugees led by House Redoran began settling in Raven Rock in 4E 0. General Carius perceived this as a threat to the garrison and demanded that the Dunmer surrender. They refused, and Carius repeatedly wrote to the Imperial Council to seek guidance. Eventually, Carius decided to declare war on Raven Rock, threatening to retaliate if the Dunmer attacked the fort.
In 4E 5, the ageing Fort Frostmoth was almost completely destroyed by the eruption of the Red Mountain. The few surviving Imperial soldiers moved to Raven Rock and attempted to establish a new garrison there, but they were too few in number to effectively protect the settlement and were replaced by House Redoran guards. In 4E 16 Solstheim officially became a territory of Morrowind when the High King of Skyrim offered the island to the Dunmer people. The East Empire Company withdrew from Solstheim by this time, taking the last vestiges of Imperial influence along with it, and the fort was never rebuilt. The ruins were taken over by Ash Spawn and Albino Spiders.
Circa 4E 201, Ildari Sarothril, an apprentice of Master Neloth of Great House Telvanni, entered the ruins of Fort Frostmoth to conduct necromantic experiments using heart stones. She succeeded in reanimating the corpse of Falx Carius, but after two months she departed when she was unable to exert any manner of control over him. The undead Carius continued his crusade against House Redoran by sending enclaves of Ash Spawn to attack Raven Rock. In 4E 201, the Last Dragonborn traced the attacks back to Fort Frostmoth and destroyed Carius on behalf of the Redoran Guard.