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Ross Island
Ross Island is a volcanic island in the western Ross Sea, Antarctica, named for explorer James Clark Ross and hosting McMurdo Station and Scott Base.
Ross, Islas
Ross, Islas, also searched as the Ross islands group or James Ross Island, is an archipelago in the Weddell Sea northeast of the Antarctic Peninsula.
Rote Island
Rote Island (Pulau Rote) is a southern Indonesian island in East Nusa Tenggara Province, located southwest of Timor. It is the principal island of the Rote Ndao Regency.
Rothschild Island (landform)
Rothschild Island, Antarctica: 39-km ice-covered island with Desko Mountains peaks, 8 km west of Alexander Island; sighted 1821, named 1909 by Charcot for Baron Édouard de Rothschild.
Rottnest Island
Rottnest Island (Wadjemup, 'place of spirits') is a 1,900 ha limestone island 18 km off Perth, a Class A Reserve famous for quokkas and beaches, formerly an Aboriginal prison (1838–1931) holding about 3,700 men and boys, now a major WA tourist destination.
Rouen Mountains
Rouen Mountains (Montes Rouen) are a c. 2,800 m mountain range in northern Alexander Island, Antarctica, extending 35 miles NW-SE from Mount Bayonne to Mount Cupola; named by Charcot in 1908-10 after Rouen, France.
Roundtop
Roundtop (Roundtop Mountain) is an eroded, glaciated stratovolcano on Unimak Island, Alaska, 13 km from False Pass; 1,871 m high, with a VEI 5 caldera-forming eruption around 7600 BCE and no historical eruptions.
Rowett Island
Rowett Island (Rowett, Isla) is a small island off Elephant Island, South Shetland Islands, Antarctica, at about 61°17′S 55°13′W, named during Shackleton's 1921–22 expedition for sponsor John Quiller Rowett.
Rowley Island
Rowley Island: uninhabited island in Foxe Basin, Qikiqtaaluk Region, Nunavut, Canada; Arctic Archipelago, area about 1,090-1,120 km2, DEW Line site FOX-1; distinct from an Ontario islet of the same name.
Rowley Shoals
Rowley Shoals: chain of three coral atolls (Mermaid, Clerke, Imperieuse Reefs) on the edge of Australia's northwest continental shelf, about 300 km west of Broome; pristine reefs with 233 coral and 688 fish species, protected as two marine parks.
Royal Geographical Society Islands
The Royal Geographical Society Islands are an uninhabited island group in Nunavut, Canada, near where HMS Erebus and HMS Terror were abandoned in Victoria Strait in 1848.
Royal Society Range
The Royal Society Range is a mountain range in southern Victoria Land, Antarctica, part of the Transantarctic Mountains on the western side of McMurdo Sound.
Rub' al Khali (رُبْعُ ٱلْخَالِي)
Rub' al Khali (رُبْعُ ٱلْخَالِي), the Empty Quarter, is the world's largest continuous sand sea, about 583,000–660,000 km² across Saudi Arabia, Yemen, Oman, and the UAE, with dunes over 330 m, 50 °C heat, Holocene paleolakes, and the 'Uruq Bani Ma'arid World Heritage oryx refuge.
Ruby Falls
Ruby Falls is a 145-foot underground waterfall inside Lookout Mountain in Chattanooga, Tennessee, discovered in 1928 by Leo Lambert during elevator shaft drilling and opened as a show cave in 1930, named for his wife Ruby.
Rügen
Rügen, Germany's largest island in the Baltic Sea off Mecklenburg-Western Pomerania, covers 926 km² with chalk cliffs, Jasmund National Park, UNESCO beech forests, seaside resorts, and a Danish princely past (1168–1325).
Rugged Island
Rugged Island (Isla Rugosa, formerly Ragged Island) is a 10.4 km² island west of Livingston Island in the South Shetland Islands, Antarctica, charted by sealers and named by Capt. J.P. Sheffield in February 1820.
Rule of thirds (diving)
Rule of thirds (diving): cave diving gas planning rule, one third of breathing gas in, one third out, one third reserve; turn pressure at two thirds of starting pressure; from Sheck Exley's 1979 Blueprint for Survival.
Rungwe
Rungwe is an active stratovolcano in southwestern Tanzania near Lake Malawi, rising about 2,950 m and last erupting around 1250 CE, the southernmost volcano in the East African Rift System.
Rusanov Ice Cap
Rusanov Ice Cap, an ice cap on northern October Revolution Island, Severnaya Zemlya, Russian High Arctic, named after lost 1912 explorer Vladimir Rusanov; outlet glaciers flow 100-150 m/year.
Russell Island
Russell Island: name shared by an Arctic island in Barrow Strait, Nunavut (74°N, 98°25′W), a Glacier Bay, Alaska island named for Israel Cook Russell, a Gulf Islands BC island, and a populated Moreton Bay, Queensland island.
Russell West Glacier
Russell West Glacier, also West Russell Glacier or Glaciar Russel del Weste, is an outlet glacier on Trinity Peninsula, Antarctic Peninsula, at 63°40′S 58°50′W, forming a through glacier with Russell East Glacier and named for FIDS surveyor Victor Ian Russell.
Ryūgū-dō
Ryūgū-dō is a Japanese sea cave named for Ryūgū, the undersea palace of the sea dragon in the Urashima Tarō legend, on the coast of Shikoku.
Ryukyu Islands (琉球諸島)
The Ryukyu Islands (琉球諸島), also called the Nansei Islands, are a 1,200 km arc of more than 900 Japanese islands, including the Amami, Okinawa, and Sakishima island groups.
S. Tome & Principe - Annobon
S. Tome & Principe - Annobon (FEOW ecoregion 587) is a freshwater ecoregion covering the Gulf of Guinea islands of São Tomé, Príncipe, and Annobón; extremely low freshwater richness but high endemism, including nine endemic amphibians and the crab Potamonautes margaritarius.
Saaremaa
Saaremaa, Estonia's largest island (2,673 km²) in the Baltic Sea, capital Kuressaare, about 31,000 residents, known for the Kaali meteorite craters, Kuressaare Castle, and Green Destination sustainable tourism.
Sabancaya
Sabancaya, an active 5,960 m stratovolcano in Arequipa, southern Peru, part of the Ampato–Sabancaya complex; the only historically active center there, erupting since 6 November 2016 with about 50 explosions per day.
Sabrina Coast
Sabrina Coast: coast of Wilkes Land, East Antarctica, between Cape Waldron (115°05'E) and Cape Southard (122°04'E), named after John Balleny's ship Sabrina, lost in 1839; near Totten Glacier.
Sacred Cenote
The Sacred Cenote (Chen K'u, Cenote Sagrado) is the ritual sinkhole well at Chichén Itzá, Yucatán, a Maya pilgrimage site receiving gold, jade, copal offerings and human sacrifices, dredged by Edward Thompson 1904–1910.
Sacro Speco
Sacro Speco (Holy Cave), the Benedictine monastery of San Benedetto at Subiaco, Italy, built into Monte Taleo around the cave where St Benedict lived as a hermit three years around 500; frescoed 9th–17th centuries, founded as a monastery by Innocent III in 1203.
Saddleback Cay
Saddleback Cay, also Saddle Back Cay or Saddleback Cays, is the name of several small Bahamian islands and rocks: an island off North Andros near Staniard Creek, an islet in the Berry Islands, and a 47-acre private horseshoe-shaped island in the northern Exuma Cays.