Chefchaouen, Morocco (19/20)

Known as the “Blue City,” Chefchaouen in Morocco is famed for its striking blue-painted walls, doors, and windows. The reason behind the blue hue is debated — some say it symbolizes the sky and heaven, while others believe it keeps mosquitoes at bay. No matter the reason, the tranquil blue tones create a serene atmosphere that has drawn travelers from around the world.