At 49:47, you can hear a loon calling in the background-a bird from North America, not Germany, where the movie takes place.
At the beginning of the film, it tells us that it is set in "Germany 1838". Technically there was no country called Germany until 1871. Wisberg is a fictional city based on Wismar, which in 1838 belonged to the Duchy of Mecklenburg. However, this is not an error, as the region was widely referred to a "Germany" even though there was no single German state.
When Count Orlok's coach meets Thomas Hutter on the road leading to his castle, the coach is pulled by a team of horses. Hutter temporarily loses his senses, and when he awakens, the coach is astride the road, but no horses are attached to the front. After Thomas enters the coach, the vehicle instantly takes off with the team of horses again attached.
However, this would be intentional as the theme of animals appearing and disappearing around Orlok's castle is used throughout the film, alluding to his supernatural powers.
However, this would be intentional as the theme of animals appearing and disappearing around Orlok's castle is used throughout the film, alluding to his supernatural powers.
When Knock escapes his cell by biting a chunk out of the guard's neck, there is no blood on Knock"s mouth, revealing that the blood and wound are CGI and not practical effects.
When Ellen and Prof. von Franz talk after exiting the coach, the snow around them is very clearly fake.
When Willem DaFoe sets fire to Knock's coffin, you can clearly see the gas jets igniting under the coffin.
Traveling by sea between Transylvania and the future Germany makes little sense. Transylvania is located in the middle of the continent and has no exit to the seas.