Mount Everest is the world’s highest mountain, but it is not the tallest, and Earth’s closest point to space is not on Everest at all. Geography is full of surprises like these once you look at exactly how something is measured.
Each fact below is verified against a government agency, a science organization or an encyclopedia, with the source linked right next to the claim. This is a short list of standout examples, not a complete ranking of every record on Earth, and figures like glacier size or coastline length can shift as scientists refine how they measure them.
Is Mount Everest really the tallest mountain?
No. Mount Everest has the highest peak above sea level, but Mauna Kea in Hawaii is taller when measured from its true base. This section covers height records only, not difficulty or danger, which depend on far more than size.
Mount Everest’s summit stands 29,032 feet (8,849 meters) above sea level, the highest point on Earth (Britannica). Most of Mauna Kea, though, sits underwater. Measured from its base on the Pacific Ocean floor to its summit, Mauna Kea rises about 33,480 feet (10,205 meters), which makes it the tallest mountain on Earth by total height even though its peak sits far lower above sea level (EarthDate, University of Texas at Austin). “Highest” and “tallest” sound like the same word, but in geography they answer different questions.
Which mountain is closest to outer space?
Mount Chimborazo in Ecuador, not Mount Everest. This section covers one specific record: distance from Earth’s center, which is different from height above sea level.
Earth bulges slightly at the equator because of its spin, so a point near the equator sits farther from the planet’s center than a point at the same elevation near the poles. Chimborazo’s summit, at 20,564 feet (6,268 meters) above sea level, sits about 6,800 feet farther from Earth’s center than Everest’s summit does, because Chimborazo is so close to the equatorial bulge (NOAA).
What is the largest lake in the world?
The Caspian Sea, bordered by five countries in Central Asia, is the largest lake on Earth by surface area even though it is named a sea. This section covers surface area only, not depth, which is a separate record.
The Caspian Sea covers about 149,200 square miles (386,400 square kilometers), making it larger than the entire country of Japan (Britannica). It is salty, like an ocean, and has no outlet to the sea, which is part of why explorers historically called it a sea instead of a lake.
What is the largest freshwater lake?
Lake Superior, on the border between the United States and Canada, is the largest freshwater lake in the world by surface area. This section covers surface area, not total water volume, which ranks lakes differently.
Lake Superior stretches roughly 350 miles from east to west and about 160 miles from north to south, and it holds the title of the largest freshwater lake on Earth by surface area (Great Lakes Commission). It could hold all the water from the other four Great Lakes combined, with room to spare.
Which river is the longest, the Nile or the Amazon?
Most sources still list the Nile as the longest river, but the exact ranking is genuinely debated among scientists. This section covers length only. The Amazon carries far more water and is not in dispute as the largest river by volume.
For most of the 20th century, the Nile held the title of the world’s longest river. In 2007, a team of Brazilian scientists argued that the Amazon is actually longer, measuring it at about 4,225 miles (6,800 kilometers) compared with roughly 4,160 miles (6,695 kilometers) for the Nile (National Geographic). The disagreement comes down to a hard question: rivers do not end at a single clear point, so where you decide a river’s mouth begins can change its measured length by hundreds of miles.
What is the tallest waterfall in the world?
Angel Falls in Venezuela, which drops 3,212 feet (979 meters) from a flat-topped mountain called Auyán-tepui. This section covers height only, not water volume, which is a separate measurement.
Angel Falls is the highest waterfall on Earth, with water falling so far that much of it turns to mist before reaching the bottom (Britannica). It sits deep inside Canaima National Park and can only be reached by boat and a hike through the rainforest.
Does the Amazon or Mekong carry more water than any other river?
By water volume, the Amazon River carries more water than any other river, and on the Mekong, Khone Falls carries more water than any other waterfall. This section covers volume only, separate from the length and height records above.
The Khone Falls, a wide set of rapids and cascades on the Mekong River between Laos and Cambodia, moves about 2.5 million gallons (9.5 million liters) of water every second, nearly double the flow of Niagara Falls (Britannica). It is not the tallest or narrowest waterfall, but no other waterfall on Earth moves that much water.
What is the largest desert in the world?
Antarctica, not the Sahara, is the largest desert on Earth, because a desert is defined by low rainfall, not heat or sand. This section covers desert size by definition, not by temperature.
A desert is any place that receives very little precipitation, typically less than about 10 inches (25 centimeters) a year. By that definition, Antarctica is the largest desert on the planet, covering about 5.5 million square miles (14.2 million square kilometers), far bigger than the Sahara (National Geographic Education).
What is the coldest temperature ever recorded on Earth?
The coldest temperature ever measured by a ground weather station is -128.6°F (-89.2°C), recorded at Vostok Station, Antarctica, on July 21, 1983. This section covers extreme cold only, not average climate for the region.
Satellites have since spotted even colder spots on the Antarctic ice sheet that ground stations do not cover, with readings as low as about -136°F (-93°C) between 2003 and 2013, but those come from satellite instruments reading the ice surface rather than a thermometer in the air (National Snow and Ice Data Center). Vostok Station’s reading remains the record for a direct ground-based measurement.
What is the smallest country in the world?
Vatican City, a walled city-state inside Rome, is the smallest country in the world at just 0.17 square miles (0.44 square kilometers). This section covers area only, not population, which ranks countries differently.
Vatican City is so small that Russia, the largest country by area, is roughly 39 million times bigger (Britannica). You could fit Vatican City inside many large city parks, yet it is a fully independent country with its own postal service, flag and government.
Ready to find these places yourself? Start with the basics on our geography section, including how continents are defined and how to use a compass to find your way.
Sources
- Britannica. Mount Everest
- EarthDate, University of Texas at Austin. World’s Tallest Mountain
- NOAA. The Highest Point on Earth
- Britannica. Caspian Sea
- Great Lakes Commission. Lake Superior
- National Geographic. Amazon Longer Than Nile River, Scientists Say
- Britannica. Angel Falls
- Britannica. Khone Falls
- National Geographic Education. Not All Deserts Are Sandy
- National Snow and Ice Data Center. Scientists Identify Coldest Place on Earth
- Britannica. List of the World’s Smallest Countries by Area
Sources & further reading
Source links are provided for editorial review. Recovered historical text has not been independently verified.