Short hike leads to the “Grotto”, a cavern like stream bed. May 5, 2014 by Matt ThomasShort hike leads to the “Grotto”, a cavern like stream bed. Independence Pass About Matt Thomas Matt is an avid writer and explorer, who loves to showcase his home state of Colorado. His favorite place to be is right here in the Centennial State. Previous Post:Independence Pass – Twin Lakes-Aspen