DLF 11.06.1871 - Die "Hayden-Expedition" beginnt
11.6.1871: Start der "Hayden-Expedition" in das Yellowstone-Gebiet
WDR 11. Juni 1871 - Start der "Hayden-Expedition"
Ferdinand Vandeveer Hayden 🗺⛵️ WORLD EXPLORERS 🌎👩🏽🚀
Yellowstone National Park: How Corporate Greed Created It
