| Galápagos Islands (Pacific, Ecuador) | Volcanic archipelago (19 main islands); a UNESCO World Heritage Site (1978) called the 'living laboratory of evolution' — home to the giant tortoise, marine iguana and Darwin's finches. |
| Canary Islands (Atlantic, off Africa — Spain) | Volcanic archipelago (7 main islands) off northwest Africa; includes Mount Teide (Tenerife) — Spain's highest peak and the 3rd-largest volcano on Earth. |
| Spratly Islands (South China Sea) | Scattered reefs, islets and atolls (~100) at a critical maritime zone connecting the Pacific and Indian Oceans; claimed by China, Vietnam, Philippines, Malaysia and Brunei — a flashpoint within China's 'Nine-Dash Line'. |
| Fiji (South Pacific Ocean) | Archipelago of 300+ islands northeast of New Zealand and east of Australia; volcanic and coral islands surrounded by reefs and lagoons. |
| Hawaiian Islands (Central Pacific, USA) | The 50th US state (since 1959), the only one located outside North America; hotspot volcanism includes Mauna Loa (Earth's largest volcano) and Kilauea (most active); hosts the strategically vital Pearl Harbor Naval Base. |
| Falkland Islands (South Atlantic Ocean) | ~778 islands ~500 km east of southern Argentina; cold, windy climate rich in wildlife (penguins, seals); site of the 1982 Falklands War — Argentina invaded, Britain recaptured after 74 days; still a sovereignty dispute. |
| Svalbard Archipelago (Arctic Ocean) | North of mainland Norway, gateway to the Arctic Ocean and Northern Sea Route; governed by the Svalbard Treaty (1920), giving signatory nations' citizens equal rights to live and work; hosts the Global Seed Vault ('doomsday vault'). |
| Kuril Islands (North Pacific Ocean) | 56 volcanic islands stretching from Hokkaido (Japan) to Kamchatka (Russia); controlled by Russia, claimed by Japan as the 'Northern Territories'; part of the Pacific 'Ring of Fire', prone to earthquakes and tsunamis. |
| Faroe Islands (North Atlantic, Denmark) | 18 volcanic islands between Iceland, Norway and Scotland with a subpolar oceanic climate; an autonomous Danish territory, self-governing domestically while Denmark handles foreign affairs and defence. |
| Diego Garcia, Chagos Archipelago (Central Indian Ocean) | A coral atoll south of the Maldives; part of the British Indian Ocean Territory (BIOT), sovereignty claimed by Mauritius; hosts a key US military base crucial for Indian Ocean security, surveillance and logistics. |