The visa requirements for vacationing in Germany depend on your country of citizenship and the length of your stay.
If you are a citizen of a European Union (EU) or European Economic Area (EEA) country, you do not need a visa to visit Germany. Citizens of certain non-EU/EEA countries, such as the United States, Canada, Australia, New Zealand, and Japan, can visit Germany for up to 90 days without a visa as long as they have a valid passport.
If you are a citizen of a country that is not part of the EU/EEA and you plan to stay in Germany for more than 90 days, you will need to obtain a long-stay visa or a residence permit.
It is always best to check the visa requirements for your specific country of citizenship and travel plans with the German embassy or consulate in your home country to ensure you have the correct documentation for your trip.