The latest special travel issue of Mental Floss Magazine explores the ways in which road trips defined America’s history. Find out about four road trips that shaped the way nature, race, and gender are viewed in the United States. This summer, explore legendary hidden cities with Mental Floss. The location of these mystical places had been unknown to man until they were recently rediscovered. Also in this issue: vacations on Mars, the world’s most dangerous volcano, and fun details about the journey of explorers Lewis and Clark. Mental Floss Magazine is always full of fascinating facts that make knowledge an adventure. In this issue, discover Van Gogh’s favorite bars, how to climb a wind turbine, the history of fireworks, and much more. Pick up your copy, available now.