Yes, you will need to have a valid passport and visa to enter Australia. A passport is an official government document that verifies your identity and citizenship and allows you to travel internationally. A visa is a document that grants you permission to enter a foreign country and stay for a specific period of time.
The United States has visa-free travel agreements with several countries, which allows American citizens to visit those countries without needing to obtain a visa beforehand. Some examples of countries where American citizens can visit without a visa include:
- Canada
- Mexico
- The Bahamas
- Barbados
- Bermuda
- Brazil
- Chile
- Costa Rica
- Ecuador
- El Salvador
- Guatemala
- Honduras
- Ireland
- Israel
- Jamaica
- Japan
- New Zealand
- Panama
- Paraguay
- Peru
- Saint Lucia
- South Korea
- Trinidad and Tobago
- Uruguay
- The United Kingdom
Note that while these countries do not require American citizens to have a visa, they may still require other documents such as a valid passport and a return or onward ticket. It is always best to check with the embassy or consulate of the country you plan to visit to confirm the requirements for entry.