Landforms and terrestrial features

Hellfire Caves

Hellfire Caves, West Wycombe, Buckinghamshire: man-made chalk and flint caverns dug 1748–1752 for Sir Francis Dashwood to relieve unemployment and build a road, later linked to his Hellfire Club.

Henderson Island (Pitcairn Islands)

Henderson Island is a remote, uninhabited coral atoll in the Pitcairn Islands and a UNESCO World Heritage Site since 1988, home to four endemic land birds.

Hendrik Ø

Hendrik Ø (Hendrik Island) is an uninhabited island in far northern Greenland, about 50 by 12 km, named after Hendrik Olsen, who vanished there during the Second Thule Expedition in July 1917.

Hertha Nunatak, also Herthainsel (German), is a 225 m nunatak in the Seal Nunataks group, Oscar II Coast, Antarctica, discovered by Captain Larsen on 11 December 1893 and named after the Norwegian sealing ship Hertha.

Hexi Corridor (河西走廊)

Hexi Corridor (河西走廊), also called Gansu Corridor, is a ~1,000 km oasis strip in northwest Gansu between the Qinghai-Tibet Plateau and Gobi, drained by the Shule, Heihe, and Shiyang rivers; the eastern Silk Road route from Wuwei to Dunhuang.

Heyuan Feng

Heyuan Feng (河源峰) is a 5,289 m peak in the Eren Habirga Mountains of the Eastern Tian Shan, China, the range's highest summit, with prominence around 2,609-2,618 m; not to be confused with Heyuan city or Yuan Feng, Taiwan.

Hibernia

Hibernia, also Iverna, Juverna, Ierne, is the classical Latin name for Ireland, first recorded by Julius Caesar, mapped by Ptolemy, and for centuries equivalent to Scotia before that name transferred to Scotland.

High Atlas

High Atlas (الأطلس الكبير, Haut Atlas): Morocco's highest mountain range, running from the Atlantic to the Algerian border; Jebel Toubkal 4,167 m; Cenozoic inversion of a Triassic–Jurassic rift; Mw 6.8 El-Haouz earthquake 2023.

High mountain

High mountain: mountains whose upper zones rise above the regional treeline and Pleistocene snow line into ice- and snow-driven processes. Also called alpine-type mountains; limits vary from 700 m in subarctic regions to 4000 m in the Rockies and Alps, with rapid elevation-dependent climate change.

High Peak (landform)

High Peak, better known as Mount Tapulao, is a 2,037-2,044 m peak in Palauig, Zambales, Luzon, Philippines; the highest point of the Zambales Mountain Range and an Ultra prominence peak.

High Plains (United States)

High Plains (United States): a nearly flat upland plateau forming the core of the Great Plains from Nebraska to the Texas Panhandle, underlain by the Ogallala (High Plains) aquifer, whose irrigation supports major wheat, corn, cotton, and cattle production while groundwater declines.

High Willhays

High Willhays is the highest point on Dartmoor and in Devon, England, at 621 meters (2,039 feet) above sea level, near Yes Tor and Okehampton on northern Dartmoor.

Highland Rim

Highland Rim: undulating Mississippian limestone plateau surrounding the Nashville (Central) Basin in Middle Tennessee, extending into Kentucky and Alabama; largest Tennessee karst region, key aquifer, about 9,300 sq mi in-state.

Hiiumaa

Hiiumaa (Dagö) is Estonia's second-largest island, 989 km², in the West Estonian archipelago; about 9,400 residents, formed by a 455-million-year-old meteorite impact, first recorded 1228 as Dageida.

Hill

Hill: a raised landform smaller and lower than a mountain, rising above surrounding terrain. Covers classification thresholds (200–500 m elevation, relief roughness), formation by uplift and erosion, hillslope erosion, and hill farming.

Hilton Head Island, South Carolina

Hilton Head Island, South Carolina: a large Sea Islands barrier island in Beaufort County, named for Captain William Hilton in 1663, site of Mitchelville, the first self-governing freedmen's village, and transformed by Charles Fraser's Sea Pines resort development after the 1956 bridge.

Himalayas

The Himalayas is a mountain range in Asia, stretching 2,900 km along the border between India and Tibet. It is known for its high peaks and massive glaciers.

Hinchinbrook Island (island, United States)

Hinchinbrook Island, Alaska: a 22-mile-long forested island at the southeast entrance to Prince William Sound, 15 mi southwest of Cordova; named by Captain Cook in 1778, site of Cape Hinchinbrook Light, Tertiary bedrock, and Chugach National Forest lands.

Hindu Kush (هندوکش)

Hindu Kush (هندوکش), an Afghan-Pakistani mountain range named "Hindu-killer" by Ibn Battuta; highest peak Tirich Mir (7,706 m), deep earthquakes at ~200 km, and rapidly melting glaciers feeding ten Asian rivers.

Hispaniola

Hispaniola (Quisqueya, La Isla Española): second-largest Greater Antilles island after Cuba, ~77,914 km², shared by the Dominican Republic and Haiti along a 388 km border; highest relief in the West Indies at Pico Duarte.

Hitra

Hitra is an island and municipality in Trøndelag, Norway, southwest of the Trondheimsfjorden; the largest island in Southern Norway (571.5–680 km²), with about 5,600 inhabitants, aquaculture and crab processing, wind farms, and subsea tunnel links to the mainland and Frøya.

Hiuchigatake

Hiuchigatake (燧ヶ岳, also Hiuchi) is a 2,356 m stratovolcano in Fukushima Prefecture, Japan, the highest peak of Oze National Park and northern Japan; last erupted phreatically in 1544 CE, and its debris avalanche formed Lake Ozenuma about 8,000 years ago.

Hkakabo Razi

Hkakabo Razi (ခါကာဘိုရာဇီ), 5,881 m, is Myanmar's and traditionally Southeast Asia's highest peak, in Kachin State at the eastern Himalaya's end. First climbed by Takashi Ozaki and Nyima Gyaltsen in 1996; its height is disputed with nearby GPS-measured Gamlang Razi (5,870 m).

Hkaru Bum

Hkaru Bum (ခရုဘမ်း) is a 3,657 m mountain in Kawnglanghpu Township, Putao District, Kachin State, Myanmar; GeoNames ranks it Myanmar's second highest peak after Hkakabo Razi, and it is the highest point of the Triangle range.

Hochkönig

Hochkönig, meaning "High King", is a 2,941-meter limestone mountain in the Austrian state of Salzburg, the highest peak of the Berchtesgaden Alps and sixth-most prominent peak in the Alps.

Hofsjökull (glaciated)

Hofsjökull is Iceland's third largest ice cap (923 km², ~200 km³), covering a dormant volcanic caldera in the central highlands and feeding the rivers Þjórsá, Hvítá, and Blanda; monitored for mass balance since 1988, it has lost about 25% of its volume since 1890.

Hollick-Kenyon Peninsula

Hollick-Kenyon Peninsula, also called Kenyon Peninsula (UK), an ice-covered spur of the Antarctic Peninsula projecting over 40 miles northeast between Mobiloil and Casey Inlets; discovered by Lincoln Ellsworth's 1935 flight and named for pilot Herbert Hollick-Kenyon, distinct from the Hollick-Kenyon Plateau in Ellsworth Land.