Americas
The largest mountain ranges are the Andes and Rocky Mountains. The Sierra Nevada and the Cascade Range reach similar altitudes as the Rocky Mountains, but are significantly smaller. In North America, the greatest number of fourteeners are in the United States, and more specifically in the U.S. state of Colorado. The highest peaks of the Americas are located in the Andes, with Aconcagua of Argentina being the highest; in North America Denali (Mount McKinley) in the U.S. state of Alaska is the tallest.
Alas Building
Alas was the tallest building in Buenos Aires between 1955 and 1995, when it was surpassed by the Le Parc tower. It has long been a vital part of the skyline of Buenos Aires, together with other, neighboring buildings on Leandro Alem Avenue, such as the similar Comega Building (1930), as well as those built in the International style during the 1970s (notably the Catalinas Norte development). Recently, however, it was overshadowed by the construction of several towers in the Puerto Madero area; as of 2009, it remains the 20th tallest building in Argentina.