During your master's, you need to do an internship and write a master's thesis. This is possible both in the Netherlands and abroad. To give an insight into your quest to find a suitable internship or master thesis, Isaac Newton organizes a lunch lecture together with the faculty for both these issues. 

The Mechanical Engineering program has a site where you can find everything there is to know about internships. Also, you can find an archive with all the internships of the past 5 years. This gives you a nice overview of the possibilities when choosing an internship. Furthermore, vacancies for internships are presented on this site. Remember to start in time when searching for an internship, especially if you want to do this outside of Europe. To help orientate you further on which internship to choose, internship reports are provided with experiences from students who have done internships in and outside Europe. The old internship reports are published in a booklet below