Reptilicus

A giant prehistoric reptile is discovered in Denmark, which regenerates into the entire creature and wreaks havoc on buildings and property. The monster can fly, swim, and walk, with impenetrable scales making it difficult to kill. As Professor Otto Martens (Asbjørn Andersen) dubs the creature "Reptilicus," it rampages from Lapland to Copenhagen, including a memorable encounter on Langebro Bridge. A sedative is eventually used to render Reptilicus unconscious, but not before its severed leg begins to move on its own, leaving room for speculation about its potential regeneration.