Aconcagua Iridescence ~ Radek Grochowski shot these images on 18th February 12 from Plaza de Mulas at 4400m looking towards the summit region. The wind was heavy and the summit was surrounded by a bizarre veil of clouds which were changing their shape rapidly. Bright At 6960m high, Aconcagua is the highest peak of the Andes.shot these images on 18th February 12 from Plaza de Mulas at 4400m looking towards the summit region. The wind was heavy and the summit was surrounded by a bizarre veil of clouds which were changing their shape rapidly. Bright iridescence was present most of the time. What's on the photos is probably the most vivid and beautiful iridescence I have ever seen. Nikon D300 and Nikkor 18-200 lens. Images ©Radek Grochowski, shown with permission