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Hyperion (tree)
Hyperion is a coast redwood (Sequoia sempervirens) in Redwood National Park, California, the world's tallest known living tree at 379.1 ft verified in 2006; its location is secret and closed to visitors.
Hyperteleaton
Hyperteleaton (Ὑπερτελέατον, Hyperteleatum), ancient sanctuary in Laconia near modern Finiki, Greece, dedicated to Apollo Hyperteleatas and Asclepius; religious center of the Eleutherolaconians, excavated 1885, Archaic Doric temple remains.
Hypogeum of Clepsina
Hypogeum of Clepsina (Ipogeo di Clepsina), a painted subterranean sanctuary at Caere (Cerveteri), named for prefect Gaius Genucius Clepsina; frescoes dated about 273 BC, solstice-aligned niche, Rosalia festival use.
Hypogeum of the Aurelii
Hypogeum of the Aurelii (Ipogeo degli Aureli), an early 3rd-century AD private freedman tomb on Rome's ancient Via Labicana near Porta Maggiore, discovered in 1919, with debated frescoes and a mosaic inscription of Aurelius Felicissimus.
Hypogeum of via Dino Compagni
Hypogeum of via Dino Compagni (Ipogeo di via Dino Compagni), also the Via Latina Catacomb: a fourth-century private Roman burial hypogeum with over 100 Christian and pagan frescoes, found in 1955, closed to the public.
Hyrcanian Forests
Hyrcanian Forests: ancient temperate deciduous forest belt along the southern Caspian coast in Azerbaijan and Iran, a UNESCO World Heritage site (2019, extended 2023) with over 3,200 vascular plants, Arcto-Tertiary relict trees, and rising wildfire and grazing pressures.
Hyria (Naxos)
Hyria (Yria, Iria; Ύρια), ancient sanctuary of Dionysus at Livadi near Naxos Town, Greece, in use from the 14th century BC to the Roman period; its four successive temples, especially the marble temple begun around 580 BC, document the earliest Ionic marble architecture.
Hyrkania/Kastellion
Hyrkania, also Kastellion or Khirbet el-Mird, is a Judean Desert hilltop site: a Second Temple period fortress reused as a Byzantine monastery founded by Sabas in 492 CE, with mosaics, cisterns, and Aramaic, Greek, and Arabic papyri.
I-City Theme Park
I-City Theme Park (officially i-City Leisure Park) is an open, no-entrance-fee theme park in Shah Alam, Selangor, Malaysia, opened December 2009, known for the City of Digital Lights LED lightscape, SnoWalk, WaterWorld, and Red Carpet 2 wax museum.
Iablaniţa
Iablanița is a commune in Caraș-Severin county, Banat, Romania, near the Serbian border, known for the Roman-period stone quarry RAN 53032.02 near the Mehadia castrum and continuing quarrying today.
Iatrus
Iatrus (Iatrum), Late Roman castellum at the Yantra mouth near Krivina, Bulgaria, province Moesia secunda; founded c. 320 AD under Constantine, excavated 1958–2000, destroyed by Avars and Slavs c. 600 AD.
Ibiza, Biodiversity and Culture
Ibiza, Biodiversity and Culture (Ibiza, biodiversidad y cultura) is a serial mixed UNESCO World Heritage site inscribed 4 December 1999, combining Dalt Vila's Renaissance walls, the Phoenician sites Sa Caleta and Puig des Molins, and Mediterranean Posidonia oceanica meadows.
Ice Age Park
Ice Age Park, also called Eiszeitpark Petersfels, is an archaeobotanical park east of Engen in Baden-Württemberg, Germany, built in 2003 around the Paleolithic Petersfels cave.
Ichihara Elephant Kingdom
Ichihara Elephant Kingdom (市原ぞうの国), also Animal Wonder Rezourt, is a zoo in Ichihara, Chiba, Japan, founded 1989, holding Japan's largest elephant herd (about ten) with rides, shows, and Thai handlers, amid animal-welfare criticism.
Iciniacum
Iciniacum was a Roman cavalry-and-infantry fort on the Upper Germanic-Raetian Limes, about 500 m northwest of Theilenhofen in Bavaria, garrisoned by about 500 soldiers and destroyed around AD 254.
Icknield Street
Icknield Street, also Ryknild Street, names two English routes: a prehistoric chalk ridgeway (the Icknield Way) and a Roman road from Bourton-on-the-Water to Templeborough via Birmingham and Lichfield, best preserved in Sutton Park.
Idiminium
Idiminium (Idiminio, Idominio) was a Roman road station in Pannonia on the Taurunum–Sirmium road, listed on the Tabula Peutingeriana between Bassianis and Tauruno, possibly at modern Vojka, dated Late Antique (Romna).
Idimum
Idimum (Idimo, Idomo), a Roman mansio or road station on the via publica Viminacium–Naissus in Upper Moesia, at Medveđa on the Resava River, Serbia; excavated 1960–1962, with baths and a vicus, occupied mainly in the 3rd–4th centuries.
idlib Zoo
idlib Zoo (حديقة حيوانات إدلب) is a zoo in Idlib city, northwestern Syria, opened 18 November 2021 as the city's first zoo, with animals brought from Turkey and Iraq; distinct from the wartime Magic World zoo near Aleppo.
Idu
Idu, ancient city at Tell Satu Qala on the Lower Zab in Iraqi Kurdistan; Middle Assyrian provincial capital, independent kingdom of seven local kings (11th-10th centuries BCE), reconquered by Adad-nerari II in 893 BCE.
Igawa Komichi Lane Stream (いかわ小道の小川, w531584078)
Igawa Komichi Lane Stream (いがわ小道の小川, OSM way 531584078/1363443795) is a 1-m-wide waterside lane along a clear koi-filled irrigation canal fed by the Yoshidagawa river in Gujo Hachiman, Gujo, Gifu, Japan; free, always open.
Ightham Mote
Ightham Mote (also Ightham Moat) is a Grade I listed, scheduled 14th-century moated manor house near Sevenoaks, Kent, owned by the Cawne, Haute, Clement, and Selby families, rescued in 1951, and bequeathed to the National Trust by Charles Henry Robinson.
Igilium
Igilium (Greek Aigylion) is the ancient Latin name of Giglio island in the Tyrrhenian Sea off Tuscany; a Domitii Ahenobarbi possession with a Roman maritime villa and granite quarries.
Iglesia Vieja
Iglesia Vieja, also called Ruina de Tonalá, is a megalithic-granite archaeological zone 4 km north of Tonalá, Chiapas, Mexico; a Zoque Early Classic capital with over 80 structures, about 30 sculptures, and free public access (closed since September 2025).
Iguaçu National Park
Iguaçu National Park (Parque Nacional do Iguaçu), a 169,695.88 ha Brazilian national park in Paraná created in 1939, protects the Brazilian side of the Iguaçu Falls and is a UNESCO World Heritage Site since 1986, criteria vii and x, adjacent to Argentina's Iguazú National Park.
Ijen UNESCO Global Geopark
Ijen UNESCO Global Geopark, East Java, Indonesia (Geopark Ijen): 4,723 km² across Banyuwangi and Bondowoso; national geopark 2018, UNESCO designation 2023; home to Kawah Ijen, the world's most acidic crater lake, and its blue sulfur fire.
Ikaho Green Bokujō
Ikaho Green Bokujō (伊香保グリーン牧場) is a farm-themed amusement park in Shibukawa, Gunma, Japan, near Ikaho Onsen. Opened 1970 by Nihon Tochi Sanrin; known for its large sheepdog show, petting zoo, butter-making workshops, and adjacent Hara Museum ARC.
Ikara-Flinders Ranges National Park
Ikara-Flinders Ranges National Park (Flinders Ranges National Park), South Australia: a 95,000-hectare park 450 km north of Adelaide, home of Wilpena Pound, co-managed with the Adnyamathanha people and part of the 2026 Flinders Ranges World Heritage nomination.
Ikh Khatuu
Ikh Khatuu (Их Хатуу) is an archaeological cemetery area in the Altai, extreme western Mongolia (Bayan Olgii), with Bronze Age and Turkic-period burials, excavated 2014-2016 by the French-Mongolian mission of Lepetz and Turbat.
Ikoma Sanjo Amusement Park
Ikoma Sanjo Amusement Park (生駒山上遊園地, also Sky Land Ikoma) is a free-admission amusement park at 642 m on Mount Ikoma, Nara, opened 1929 by Kintetsu's predecessor, home to Japan's oldest large-scale ride, the Flying Tower.