Research student internships in physics is one way that students can gain a broad range of research experience in a variety of research environments, and develop international contacts. We explore international physics research internships, focusing on the academic learning experiences, by interviewing four international research interns in a research-driven Australian university. Based on the students' internship experiences, we provide practical information regarding internships. We discuss facilitating successful learning outcomes, support of students, the choice of an Australian internship, arranging internships, and life aspects to be considered for potential internship students. This would assist students who are interested in overseas internships, and host institutions, to maximise the success of such visits.