The longest highway recognized in the Guinness World Records is the **Pan-American Highway**, which runs from Alaska, United States, to Ushuaia, Argentina, and links 14 nations. It covers roughly 30,000 km, similar to driving from Seoul to Busan 75 times. Nevertheless, a 90 km stretch called the **Darién Gap** between Panama and Colombia is not connected, meaning vehicles must be shipped by boat. This region, a challenging tropical rainforest under the control of the Colombian drug cartel, is also referred to as the “last unexplored area on the planet.”

Within one nation, Australia’s **Highway 1** is recognized as the longest highway. It stretches roughly 14,500 km, creating a loop along the Australian shoreline, linking major urban centers like Sydney, Melbourne, Brisbane, and Perth. In contrast to the Pan-American Highway, Highway 1 has no breaks and serves more than 1 million travelers each day.

Russia’s **Siberian Cross-Country Highway** extends roughly 11,000 km, connecting Moscow with Vladivostok. It passes through extensive forested areas and regions with permanent ice, acting as a key route for Russian transportation. Canada’s **Cross-Country Highway**, which covers 7,300 km, links 10 provinces and goes through well-known tourist spots such as Banff National Park, offering a favored road trip experience.

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