The Duchy of Daenia is a region in central High Rock, in the Iliac Bay region. Daenia is bordered by Ykalon to the west, the Ilessan Hills and Shalgora to the south, Anticlere to the east, and Urvaius to the north. The Thrafey clan is the predominant vampire bloodline in the region.
The Kingdom of Daggerfall is a region in the southwest of the High Rock province, on the north half of the Iliac Bay, named after its capital city, Daggerfall. It is bordered by Glenpoint and Ilessan Hills to the northwest, Tulune to the west, and Shalgora to the north. Daggerfall was once home to a gladiatorial team known as the Guardians. The order Knights of the Dragon have the official duty of protecting the city and royal family of Daggerfall. The last census, in 3E 401, lists the population at over 110,000. For more information, see the Lore article on Daggerfall.
 Dagon Fel
Dagon Fel was the northernmost town in Vvardenfell, situated on the island of Sheogorad. It was home to Nord fishermen, as well as a detachment of Imperial Legion guards. There was a tiny inn with warm beds and a few traders. The most interesting things in Dagon Fel were the three Dwemer towers outside the city. Strict laws prevented the trading of Dwemer artifacts taken illegally from the ruins.
 The Deadlands
The Deadlands are a Daedric realm of Oblivion created and ruled over by the Daedric Prince of Destruction, Mehrunes Dagon. The embodiment of its creator's sphere, the dimension is fraught with natural disasters and destructive change. The realm is covered by an ocean of lava, scattered with scorched volcanic islands and ruined structures. Many lesser Daedra roam the realm freely, but Dremora dominate the hierarchy. Very little flora grow in the realm's hostile environment. Burnt grass and dead trees dot the landscape, while Bloodgrass, aggressive Harrada Roots and poisonous Spiddal Plants grow abundantly in the charred soil.
 Deshaan Plain
The Deshaan Plain is a fertile area in southern Morrowind, which merges with the swamps of Black Marsh further south. It borders the Valus Mountains to the west and the banks of the Thir River to the east, where the Hlaalu city of Narsis is situated.
 Direnni Tower
The Direnni Tower, also called the Ur-Tower, the Adamantine Tower and Ada-mantia, is a tall, circular, and ancient tower at the highest point of the Isle of Balfiera in the Iliac Bay. The Tower was used as a fortress, prison, and palace by the Direnni Hegemony, but its true purpose has remained a mystery. The latest magical divination of its age places its construction around ME 2500, making it the oldest known structure in Tamriel. The tower has been modified several times over the years, but the cylindrical core of metal has not been touched and is rumored to extend as far into the ground as it does protrude above it, but its depths have never been thoroughly explored.
 Dragon's Teeth Mountains
A mountain range which stretches from the icy mountains of High Rock, down through Hammerfell, then somehow passes into Valenwood, though Hammerfell and Valenwood do not border each other. Fang Lair, a Dwemer stronghold in Hammerfell, is located in these mountains. It's said that the southernmost tips of the mountain range could be seen from the top parapet of the Crystal Tower of Summerset Isle. "By the Dragon's Teeth" is a common saying among Redguards.
Dragonstar is a city-state in Hammerfell, just south of the border with High Rock and Skyrim. The city was once home to a gladiatorial team known as the Sacred Rage. During the War of Bend'r-mahk, the forces of Skyrim advanced into Hammerfell and besieged the city. The situation has persisted to at least 3E 432.
The city is divided into western and eastern sections, walled off from each other, each with their own government. Dragonstar West is still under the control of Hammerfell, while Dragonstar East is predominated by Skyrim. An atmosphere of deep mutual distrust prevails between the two sides. The city has an arena pit, a prison and guild halls for the Mages Guild, Fighters Guild and Thieves Guild. Shadow Gates can also be found in the city.
 Dragontail Mountains
The Dragontail Mountains form a large region in Hammerfell, south of Iliac Bay. The mountain range acts as a border for many other regions, including Tigonus, the Alik'r Desert, Santaki, Dak'fron, Lainlyn, Kozanset, Totambu, and Mournoth, and it completely surrounds Ephesus. The provincial seat is the city of Dragontail.
 Druadach Mountains
The Druadach Mountains are a mountain range which separate western Skyrim and eastern High Rock and Hammerfell. The misty peaks tower over Markarth and Karthwasten in the Reach, though they gradually diminish closer to Haafingar and Solitude. The range curves around the Karth River, and nearly stretches into Falkreath Hold. Since the First Era, the Reachmen have been taking advantage of the cliffs, caves, and rugged terrain of the Druadach Mountains in guerrilla warfare campaigns against invading armies. They are home to many ancient ruins, fortresses, and Orc strongholds.
Dune is a city in Anequina in northwestern Elsweyr, near the border with Valenwood. The Imperial Legion outpost Sphinxmoth Legion Fort is located nearby. During the Five Year War, a major battle took place outside the fort between the Bosmer of Valenwood and the Khajiit of Elsweyr. A soldier named Codus Callonus was stationed at the fort and was so impressed by the Khajiiti tactics during the battle that he recorded his impressions in a series of books. Only the first volume, Mixed Unit Tactics, remains. Dune was once home to a gladiatorial team known as the Blades, who share their name with the personal guards of the Septim Emperors.
 Dunmeth Pass
Dunmeth Pass is the main pass and one of the few traversable roads leading through the Velothi Mountains between northwestern Morrowind and eastern Skyrim. On the Morrowind side it is found near the city of Blacklight and in Skyrim it emerges from the mountains near the city of Windhelm.
The Barony of Dwynnen is a region on the southern coast of High Rock, in the Iliac Bay. It shares borders with Anticlere and Urvaius in the south, Phrygias to the west and north, Bhoriane and Kambria to the east, and the Wrothgarian Mountains to the north. According to legend, the province was created shortly after the man who would become the first Baron Othrok emerged from the wilderness and defeated the lich of Castle Wightmoor and its undead force. The Battle of Wightmoor is believed to have taken place in in 3E 253, and is celebrated by the people of the barony every 5th of Suns Dawn.