On a hill at the confluence of the Jimenoa and the Yaque del Norte an alum deposit reaches the surface and the natives gather alum which they sell in Santiago City.
The largest and most beautiful waterfall of the island is doubtless that of the Jimenoa River, in the mountains some ten miles south of the city of La Vega, where the Jimenoa rushes over a precipice one hundred feet in height, producing clouds of spray and a roar that can sometimes be perceived as far as Jarabacoa, six miles away.