1,338 articles
Seal Islands
Seal Islands: a group of small islands and rocks 3–6 nautical miles northwest of Elephant Island, South Shetland Islands, Antarctica, charted by Bransfield in 1820 and named by William Smith for the seals caught there.
Seashore
Seashore: the land along the edge of the sea or ocean, usually sandy or rocky; in law the land between high- and low-water marks. Shaped by waves, tides, erosion, and sea-level change.
Seasteading
Seasteading is the concept of building permanent dwellings at sea, called seasteads, outside any government's territory, promoted since 2008 by the Seasteading Institute, founded by Patri Friedman and Peter Thiel.
Seiland
Seiland (Northern Sámi: Sievju) is a rocky Norwegian island in Finnmark, southwest of Hammerfest, with an area of 584 km² that makes it the seventh-largest island on the Norwegian mainland.
Selayar Island
Selayar Island (Pulau Selayar), a roughly 80 km long island off southern South Sulawesi, Indonesia; main island of Selayar Islands Regency, historic cotton and spice-trade hub, home of the world's largest Dongson bronze drum, and gateway to Taka Bonerate National Park, the world's third-largest atoll.
Senja
Senja (Sážža) is Norway's second largest mainland island, in Troms, 1,586 km², ~7,500 inhabitants, home to the 102-km Norwegian Scenic Route Senja, Ånderdalen National Park, and Kaperdalen Sami heritage.
Senkaku Islands (尖閣諸島)
Senkaku Islands (尖閣諸島), also Diaoyu/Diaoyutai: uninhabited East China Sea islets in Ishigaki City, Okinawa, incorporated by Japan in 1895, administered by Japan but claimed by China and Taiwan, source of ongoing coast guard standoffs.
Sentosa
Sentosa is a 500-hectare resort island at Singapore's southern tip, formerly Pulau Blakang Mati, developed from 1972 by SDC. Known for beaches, Resorts World Sentosa, Universal Studios Singapore, Fort Siloso, and the Greater Sentosa Master Plan with Pulau Brani.
Seram Island
Seram Island (Nusa Ina, Mother Island), largest island of Indonesia's Maluku province at about 17,100 km2, site of the Nunusaku origin legend, Manusela National Park, and the producing Seram hydrocarbon basin.
Serranilla Bank
Serranilla Bank (Banco Serranilla), a submerged Caribbean carbonate platform at 16°N 80°W on the Nicaraguan Rise, about 1,200 km² with a few low cays; administered by Colombia, also claimed by the United States, with ICJ litigation and a 1986 Honduras treaty dividing it.
Seward Peninsula
Seward Peninsula: large peninsula of northwestern Alaska jutting toward Russia across the Bering Strait; site of Bering Land Bridge National Preserve, the Nome gold rush of 1898-1910, and continuous permafrost tundra.
Shackleton Coast
Shackleton Coast, Antarctic coast between Cape Selborne and the eastern Beardmore Glacier on the Ross Sea, named for explorer Ernest Shackleton; discovered 1907-09, NZ Gazetteer official name.
Shadowa
Shadowa is a small island in Pemba North Region, Tanzania, in the Zanzibar Archipelago, about 2.5 miles (4.1 km) from Pemba Island; also recorded as a cove near Kitambuu, ward Kwaalinatu, time zone Africa/Dar es Salaam.
Shamian (沙面)
Shamian (沙面), also known as Shameen, is a small artificial island in the Pearl River in Guangzhou, China, built as a British and French concession after the Second Opium War.
Shandong Peninsula (山东半岛)
Shandong Peninsula (山东半岛), also called Jiaodong Peninsula, is China's largest peninsula, between the Bohai and Yellow Seas; home to Qingdao, Yantai, and Weihai, with a 3,121 km coastline marked by rapid artificial-shoreline growth and natural-shore erosion.
Shannon Ø
Shannon Ø (Shannon Island), large uninhabited island in Northeast Greenland National Park east of Hochstetter Forland, about 1,258.5 km², named by Clavering in 1823 for HMS Shannon; site of the 1909–12 Alabama expedition hut and the 1943–44 German Bassgeiger weather station.
Sherbro Island
Sherbro Island, Sierra Leone's largest island (about 600 km2, 51 km long), lies off the southern coast with Bonthe as its main town; known for the Sherbro people, colonial slave-trade ports, fishing, and the planned Sherbro Island City SEZ backed by Idris Elba.
Shetland
Shetland, also known as the Shetland Isles, is a subarctic archipelago of about 100 islands off northern Scotland, mortgaged by Denmark to Scotland in 1469.
Shikoku (四国)
Shikoku (四国) is the smallest of Japan's four main islands, between the Seto Inland Sea and the Pacific, comprising Tokushima, Kagawa, Ehime, and Kochi prefectures; known for the 88 Temple Pilgrimage and Nankai Trough earthquake hazard.
Shikotan (色丹島)
Shikotan (色丹島, Шикотан) is a 250.6 km² island lying 73.3 km east of Hokkaido's Nemuro Peninsula; Japan claims it, but Russia has administered it since 1945.
Shimo Jima
Shimo Jima (Shimoshima, Amakusa Shimoshima) is the largest island of the Amakusa archipelago, Kumamoto, Japan: 575.0 km², eighth largest in Japan, population about 87,200, washed by four seas and linked by bridges.
Shiretoko
Shiretoko (知床), a peninsula in northeastern Hokkaido, Japan, and its surrounding Sea of Okhotsk waters; a 71,100 ha UNESCO World Heritage Site inscribed in 2005 under criteria (ix) and (x), defined by seasonal sea ice at the lowest latitude in the northern hemisphere.
Shoal
Shoal: a natural underwater sand ridge, bank, or bar shallower than surrounding water, and a hazard to navigation charted by hydrographic surveys; also a fish group.
Siargao
Siargao: island group in Surigao del Norte, northeastern Mindanao, Philippines, famed for the Cloud 9 surf break and the Siargao Island Protected Landscape and Seascape (SIPLAS). Known for surfing tourism, the country's largest mangrove forest, and Typhoon Odette (Rai) recovery.
Siberut
Siberut, the largest and northernmost Mentawai Island off western Sumatra, Indonesia; 4,480 km², indigenous Mentawai majority, UNESCO Biosphere Reserve since 1981, four endemic primates, and a locked megathrust section last ruptured in 1797.
Sicily
Sicily (Sicilia), the largest Mediterranean island at 25,426 km² with about five million people, an autonomous Italian region home to Mount Etna, Europe's largest active volcano, seven UNESCO World Heritage sites, and a layered Greek, Arab, Byzantine, and Norman history.
Siesta Key, Florida
Siesta Key, Florida: an 8-mile barrier island off Sarasota on the Gulf coast, famed for 99% quartz sand that stays cool, Siesta Beach's 950-space free lot, lifeguards, and top rankings including No. 28 on the 2026 World's 50 Best Beaches list.
Sillem Island
Sillem Island, officially Qikiqtaaluk (ᕿᑭᖅᑖᓗᒃ), is an uninhabited glaciated island in Baffin Bay off northern Baffin Island, Nunavut, Canada; 482 km², separating Gibbs and Clark Fiords, within proposed Agguttinni Territorial Park.
Simeulue
Simeulue is an Indonesian island about 150 kilometers off the west coast of Sumatra and the seat of a regency in Aceh province, centered on Sinabang.
Sinai Peninsula
Sinai Peninsula: triangular Egyptian landmass of about 61,000 km² between the Mediterranean, Gulf of Suez, and Gulf of Aqaba; highest peak Mount Catherine (2,637 m); returned to Egyptian sovereignty in 1982 under the 1979 peace treaty.