Where: GermanyWhat to do: Berlin has some of the best Christmas markets around the world. Enjoy a bird’s eye view of the city from the Reichstag’s Dome. Then, go for some sightseeing in Berlin to places like Brandenburg Gate and Holocaust Memorial. Stroll and relax in Tiergarten, Berlin’s most famous park, and enjoy a peaceful evening by the Bathing lakes. December is an eventful month in Berlin; the city holds multiple events.