3The Transfagarasan Highway, Romania

Route: Sibiu – Balea Lake – Vidraru Dam – Curtea de ArgeșDistance: 90 km (56 miles)Best Time to Go: July to OctoberDubbed “the world’s greatest road” by Top Gear, Romania’s Transfagarasan Highway is a winding route through the Carpathian Mountains. Expect hairpin turns, tunnels, and breathtaking alpine scenery. Stop by Balea Lake and Poenari Castle, the real-life home of Vlad the Impaler.