Think you know your way around a world map? Identifying a handful of major global flags might seem easy, but the world of vexillology—the study of flags—is filled with optical illusions, historical twins, and intricate designs that defy expectations. Did you know that two countries on opposite sides of the planet share a flag that looks almost identical? Or that one country completely rejects the standard rectangular shape? It takes more than a casual travel background to ace this test. We’ve lined up 40 flags from every corner of the globe, blending massive superpowers with deceptive look-alikes and rare layouts. Statistically, only 1 in 50 geography nerds can name all 40 of these global flags. Will you conquer the world, or get tripped up by a color swap? Let’s find out!