Old ranger gets the bonus on both Intelligence or Wisdom checks.
I guess I didn't list the rest of the benefits old ranger gets.
While traveling for an hour or more in your favored terrain, you gain the following benefits:
- Difficult terrain doesn’t slow your group’s travel.
- Your group can’t become lost except by magical means.
- Even when you are engaged in another activity while traveling (such as foraging, navigating, or tracking), you remain alert to danger.
- If you are traveling alone, you can move stealthily at a normal pace.
- When you forage, you find twice as much food as you normally would.
- While tracking other creatures, you also learn their exact number, their sizes, and how long ago they passed through the area.