One of the signs on the road leading to the Black Forest reads as, "Abandon Hope All Ye Who Enter". This is a reference to Inferno, the first part of Dante Alighieri's epic poem Divine Comedy. In the poem, Dante passes through the gate of Hell, which bears an inscription ending with the famous phrase:
"Through me you pass into the city of woe: Through me you pass into eternal pain: Through me among the people lost for aye. Justice the founder of my fabric moved: To rear me was the task of Power divine, Supremest Wisdom, and primeval Love. Before me things create were none, save things Eternal, and eternal I endure. All hope abandon, ye who enter here."