The Frankfurt Green Belt covers around 8,000 hectares and was established in 1991 as one of the first urban green belts in the world with its own constitution. In 2026, it will celebrate its 35th anniversary - and even for seasoned Frankfurt specialists, there is still much to discover, as a lot has changed over the past three and a half decades. The Green Belt brings together a variety of landscapes, ranging from the city forest in the far south to the Berger Rücken in the northeast, where corn and wheat fields shape the landscape. Along the Nidda River, there are floodplain forests and meadows, designed nature in the form of historical parks, and even a former airfield, whose runway is now used by skaters. "Exploring the Green Belt" not only follows the 68-kilometer circular hiking trail but also includes numerous detours. Those who truly want to embark on an expedition at the city’s edge will find the right adventures here.