I was recently told, 'You're a liar!' when I said to...

I was recently told, 'You're a liar!' when I said to somebody I walked down the spine of the Andes. Every Spaniard in the sixteenth, seventeenth century did that. The idea that somebody could just walk! He can jog perhaps in the morning, but he can't walk anywhere! The world has become inaccessible because we drive there.