A bus in Argentina, traveling between Humahuaca and Iruya.
Courtesy of Prisma Bildagentur/Alamy
In India, it's common for drivers to decorate their buses with wallpaper, flowers, and even shrines.
Photo by Dan Eckstein
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.