[dirtboy]

Take I-95 North to Wilmington, Delaware. Look for 202 North. Take 202 North into Pennsylvania - it will be a 4 to 6 lane road with traffic lights. Near West Chester, it will veer off to the right and become a 4-lane highway. Follow that for about 15 miles until you see an exit for Pennsylvania 252. Take that north to into Valley Forge Park, and it will dead-end into PA 23 at a traffic light. Turn left at the light, and Freedom Foundation will be on your right after about a mile or so.

[baseballmom]

Dirtboy's directions might be better than mine. I believe his is a more direct route as the crow flies.