Not all streets are created equal. Take the colorful Caminito that anchors Buenos Aires’s La Boca neighborhood: It not only provides visitors with a vibrant photo op but also serves as a reminder of how the neighborhood was built in the 19th century. Streets, however, don’t have to offer a history lesson or be rendered in Technicolor to be charming. Some are notable for their stunning natural features, such as the cherry blossom tunnel in Bonn, Germany, which makes an appearance for a few short weeks every spring. Here AD surveys twenty-five of the most beautiful streets in the world.