Welcome to the quebrada de humahuaca named a world heritage site in 2003 this 5 hour mountain bike tour will travel the rural gravel roads to visit tilcara and its surroundings discover multicolored and eroded hills a product of millions of years of erosion as well as the history of the area leave the bikes for a short hike to admire the fossils of the cerro amarillo and visit the pucara of juella