Couple enjoying bike ride in mountains. Smiling cyclists exercising on stone road between canyons. Cheerful tourists riding bikes on fun summer vacation trip outdoors. Holiday healthy lifestyle concept. Concept about people and sport. Guided bike tours. Stone Road, which was built in 132 years in the Kemaliye district of Erzincan, Turkey, with the hard struggle of the local residents, and which is shown as one of the “most challenging roads in the world”, welcomes adrenaline enthusiasts every season. The world’s second largest canyon after the Grand Canyon, the Dark Canyon, which is flooded by foreign tourists, is here.