As both a concept and a continent, the area known as Europe has shifted over time.
Many see Europe (as a physical landmass) as not a discrete continent, but a peninsula on the Eurasian landmass. Culturally though, the idea of Europe as distinctly bracketed of from Asia, is a powerful idea is not in the Western World. Where is Europe? What is Europe? This article would provide good information for a lesson on regions and how we conceptualize the world within that regional framework.
Via Seth Dixon