Kevin Poe, the original "Dark Ranger" of the National Park Service, talks dark night skies in the National Park System in this week's episode. Traveler contributing writer Kim O'Connell discusses what she's learned while researching a story on the state of Venezuela's national parks during the current social and political turmoil in that country, and host Kurt Repanshek concludes with a look at some of the "devilish" places in the park system.