Pan-American Highway
The Pan-American Highway is a network of roads stretching across the American continents and measuring about in total length. Except for a rainforest break of approximately , called the Darién Gap, the roads link almost all of the Pacific coastal countries of the Americas in a connected highway system. According to "Guinness World Records", the Pan-American Highway is the world's longest "motorable road". However, because of the Darién Gap, it is not possible to cross between South America and Central America with conventional highway vehicles. Without an all-terrain vehicle, it is necessary to circumnavigate this terrestrial stretch by sea.
Potosi, Wisconsin
Local road signs herald Potosi's Main Street as "the longest Main Street in the world." A newspaper article traces the claim to a 1950s item in "Ripley's Believe It Or Not" which made the more qualified statement that it is the longest Main Street "without a cross street." Current maps show a three-mile stretch, with numerous streets—including one named "Cross Street"—that drain into it and end, forming T-shaped intersections, but no street that continues across it. The stretch is divided into two portions each with a distinct street name: North Main Street and South Main Street.