I think in my years of going barefoot, the number one thing to walk barefoot on is mud. As a child you could just get all muddy and it's worth getting in trouble sometimes. Though stepping in mud with bare feet is infinitely most fun and you don't have to worry about a really long clean up. My favorite type of mud is fresh mud after a rain fall. What about you guys? Have you ever walked in mud and what type of mud do you like walking in?