Hesse's first national park, established in 2004, encompasses one of the largest extant red beech forests in Central Europe, the Kellerwald, and the Edersee, a serpentine artificial reservoir 55km northeast of Marburg and about the same distance southwest of Kassel. Some 400 springs feed creeks that, as one brochure puts it, are 'a true paradise for the fire salamander'. Larger land animals include red deer; overhead you may see eagles and honey buzzards and, at night, various species of bat.