The only one of these places in Bolivia houses the Mount Chacaltaya Laboratory, which was the site of the first observations of pions. A national park named for these places that houses the village of El Chaltén contains much of Viedma Lake and houses one of them named Spegazzini. Two of these features named San Quintin and San Rafael (-5[1])are contained within the boundaries of Laguna San Rafael National Park. The University (10[1])of Uppsala sponsored studies of a namesake one of these features near Argentino Lake. El Calafate is located near one of these features in Santa Cruz Province known for its ruptures, the Perito Moreno. (10[1])A national park named for these features (10[1])on the Argentina-Chile border in Patagonia houses Mount Fitz Roy. For 10 points, name these cold features common in Patagonia, (10[1])known for their dramatic (10[1])icefalls. ■END■ (10[4]0[1])