1. The world's largest volcano, Mauna Loa, is located in Hawaii and is also one of the Earth's most active volcanoes.
  2. The world's largest river, the Amazon River, discharges more water into the ocean than the next seven largest rivers combined.
  3. The world's largest island, Greenland, is technically a territory of Denmark and not its own country.
  4. The Dead Sea, located between Jordan and Israel, is the lowest point on Earth and has a salt concentration that is so high that people can float effortlessly on its surface.
  5. The Great Barrier Reef in Australia is the world's largest coral reef system and can be seen from space.
  6. Mount Everest, the highest mountain in the world, is located on the border between Nepal and Tibet and is over 29,000 feet tall.
  7. The world's largest salt flat, the Salar de Uyuni, is located in Bolivia and is so reflective that it is used to calibrate satellites.
  8. The Caspian Sea, located between Europe and Asia, is the world's largest inland body of water and is technically not a sea, but a lake.
  9. The Danakil Depression in Ethiopia is one of the hottest places on Earth, with temperatures regularly exceeding 120°F (49°C).
  10. The Aurora Borealis, or Northern Lights, can be seen in countries such as Norway, Sweden, Iceland, and Canada, among others, due to the Earth's magnetic field.