I want to go to Walgreen's at 4 in the morning.
You know how to get there, right?
I'm not sure where I'm going, but when I get near to walgreens I turn left.
Sounds like you might want to look at a map. If you have an iPhone, ask Siri for directions.
What's a map?
A map is something that shows you directions. You can use Google or Siri to bring one up for you and show you the best route to Walgreen's.