Assuming you're travelling on a US passport you need a visa to enter Australia. See http://www.immi.gov.au for visa information and how to apply.US citizens do not need a visa to enter Spain. As a tourist you are entitled to stay for 90 days out of every 180 days in the Schengen Zone – that includes Spain and Western Europe – without a visa.. 2 years ago 3 people rated this as good trghtgError processing request
