The Tranquilo Traveler | The Tranquilo Traveler is a celebration of voluntourism, slow travel, and other interesting ways to see the world. Travel writer and award- winning Moon Handbooks author Joshua Berman created The Tranquilo Travel as a resource for world trippers and international volunteers, a window to the authorâ€™s travels in Nicaragua, Belize, and beyond, and an update of his books and articles.