Machu Picchu, the mountain citadel high in the Andes Mountains of Peru, is a familiar icon of the Inca Empire. Perched high on a steep and narrow ridge between two mountain peaks, the site is ringed on three sides by the Urubamba River, a dizzying 1,600 feet below.
The US Geological Survey produces maps that are works of art, as well as highly informative cartography. Meticulously hand drawn by artists, many of these maps can be appreciated for their visual appeal, even if you don’t delve too deeply into the details of rock units, faults and folds. One of my all-time favorites is the "Geologic Map of the United States" published in 1974.