Australia - Sydney
Travel Visa




Below are the traveling visa requirements for United States citizens :. For other countries, check out this link

Business:
Visa Required (apply)
Tourist: Visa Required (apply)

You can purchase this using your smartphone at the airport terminal. The approval process and visa number is instantly sent to the airline.
https://www.eta.immi.gov.au/ETA/etas.jsp

Source : TravelVisaPro.com