Explore the Differences. Discover the Similarities. Learn about the world around you. 3 part Travel Adventure based on your Personal Interests. Small groups of 10 adults. Adventures have 3 group leaders: Experienced and Certified Tour Guide, GNSA LEADER, GNSA Translator. We can Explore, Discover, and Learn about anywhere in the world: Africa, Antarctica, Asia, Australia/New Zealand, Europe, or the Americas