Have you ever done an American road trip?

Across a bunch of states in the U.S.? Where did you start and end? Why did you go? What did you stop to see and do along the way? Have you ever driven across the U.S.-Mexican border, through Mexico and down to Central or South America?

I’m thinking about doing one soon, and would love to hear stories…having a hard time eliminating states from trip…I’m also considering driving thru Mexico but have heard bad things about driving there solo.