A primary forest is a forest composed of native species where no trace of past or present human activity is clearly visible. They are intact (or original) forests, or forests with a high degree of naturalness that have never been destroyed or heavily exploited, fragmented, or directly or obviously influenced by humans. Urwald von morgen is a primary forest of tomorrow and is located in Simonswald in Baden-Württemberg, Germany. It has not been exploited since 1979.