Bogd Khan Uul National Park, Mongolia (1783)
Many mistakenly think America’s Yellowstone National Park is the oldest in the world but there’s one that was created a century earlier. Established by the Mongolian government in 1778, the area surrounding Bogd Khan Uul Biosphere Reserve is actually the oldest in the world. It is located south of the capital, Ulaanbaatar, and takes three to four hours to hike. You’ll find many cultural sites surrounding the park, including the ruins of Manzushir Monastery, Buddha Park, and Zaisan Memorial.