Our curator of historic structures & landscapes discusses covered bridges with host Mo Rocca, who also shows us the device rewarding your pooch, taking a picture with your wrist, and reusable washcloth tablets.

Our curator of public life shares the history of America's national parks with host Mo Rocca, who also shows us custom camper vans, dousing a fire with the toss of a ball, and how to create compost on your kitchen countertop.