My magical mystery tour...

I will soon head off on my latest adventure into the great outdoors. Since I got lost and turned around last time, I've decided to bring one (and possibly two!) people to assist me in my latest quest. I don't want to reveal too many details because I'm writing a travel article about this and don't want to get scooped -- but my journey will involve a lot of American history, one long and dark tunnel, a crashing waterfall, and at least 100 miles (!!!) of traveling. I'll reveal more details later on.