If you are fascinated by the history of life on Earth, you might want to visit Stevns, a peninsula in southeast Zealand that is home to a UNESCO World Heritage Site. Here you can see the Stevns Klint, a 15-kilometer-long cliff that exposes a thin layer of clay that marks the boundary between the Cretaceous and Paleogene periods. This layer contains traces of the asteroid that wiped out the dinosaurs and many other species 65 million years ago. You can also explore the Cold War Museum at Stevnsfort, a former underground fortress that was part of Denmark's defense system during the Cold War. Stevns offers a rare opportunity to witness the geological and historical events that shaped our planet.