When to use 'the' with countries, rivers, mountains, and other geographical names
The + geographical name (when required) OR just the name (no article)
Same rules apply
Same rules apply
💡 The key is whether the name is plural, contains a common noun (Republic, Kingdom), or is a water body/range.
✓I visited the United States.
✗I visited United States.
Countries with States/Kingdom/Republic need 'the'.
✓Mount Fuji is beautiful.
✗The Mount Fuji is beautiful.
Single mountains don't take 'the'.
✓The Amazon is the longest river.
✗Amazon is the longest river.
Rivers take 'the'.