What was once a throwaway line in a 3.5-hour long movie has, thanks to the slow burn of Sean Bean's amazingness, become one of the most memorable quips in all three Lord of the Rings flicks.
Mostly because he has a point! One does not simply walk into Mordor. Or...can they?
Kerry Shawcross and Chris Demarais from Rooster Teeth (of Halo's Red v Blue fame) decided to put Boromir's theory to the test, scouting out the real-world locations for both Hobbiton and Mt. Doom and walking the distance.
At "only" 120 miles, it's a lot easier than Frodo and Sam's journey, though...I hate to be the 1984th person to point out that their journey doesn't really begin until they hit Rivendell, and as the map at the beginning of the video shows, that's a hell of a lot further than 120 miles.
A Simple Walk Into Mordor: Episode 1 [Rooster Teeth]