A bus in Argentina, traveling between Humahuaca and Iruya.
Courtesy of Prisma Bildagentur/Alamy
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In India, it's common for drivers to decorate their buses with wallpaper, flowers, and even shrines.
Photo by Dan Eckstein
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Okay, we know these historic streetcars aren't technically buses. But they've been an integral part of New Orleans transportation since the mid-19th century, which makes them more than deserving enough for a spot on the list. Here, a red line tram on Canal Street.