The longest road in the world that a person can walk...
The longest theoretically walkable road on Earth stretches from Cape Town to Magadan, spanning roughly 22,387 km (13,910 miles) without the need for any boat or air travel. The route passes through about 17 countries, crossing Africa, the Middle East, Central Asia, and into Siberia via connected roads and bridges.
Even at an ambitious pace of 12 hours of walking per day, the journey would take around a year to complete. At a more moderate schedule of 8 hours per day, it would extend to roughly a year and a half of continuous travel.