Planetary Summits & Major Mountain Ranges
Earth's highest continental elevations and tectonic uplift zones.
Mount Everest
Nepal / China
K2
Pakistan / China
Kangchenjunga
India / Nepal
Aconcagua
Argentina (Highest in Americas)
Denali
United States
Mount Kilimanjaro
Tanzania (Free-standing volcano)
Longest Continental River Systems
Major fluvial drainage basins shaping human civilization and ecosystems.
Nile River
Amazon River
Yangtze River
Mississippi-Missouri
Largest Global Deserts & Arid Biomes
Regions receiving less than 250 millimeters of precipitation per year.
Antarctic Desert
Arctic Desert
Sahara Desert
Arabian Desert
Gobi Desert
Key Geographic Lines of Reference
The Equator (0° Latitude)
Divides Northern and Southern Hemispheres; spans 40,075 km across 13 sovereign nations.
The Prime Meridian (0° Longitude)
Passes through Greenwich, London; defines universal Coordinated Universal Time (UTC) reference.
Tropic of Cancer (23.4° N)
Northernmost latitude where the Sun can appear directly overhead at June solstice.
Tropic of Capricorn (23.4° S)
Southernmost latitude where the Sun can appear directly overhead at December solstice.
International Date Line (180° Longitude)
Imaginary boundary zigzagging through the Pacific where calendar day transitions.