Breathtaking Viewing Platforms

GRAND CANYON, AZ - MARCH 20: VIP's and members of the media and the Hualapai tribe take a preview walk on the Skywalk, billed as the first-ever cantilever-shaped glass walkway extending 70 feet from the western Grand Canyon's rim more than 4,000 feet above the Colorado River, on March 20, 2007 on the Hualapai Reservation at Grand Canyon, Arizona. The building of the Skywalk on Hualapai Indian tribal land 90 miles downstream from Grand Canyon National Park has stirred controversy with some tribal elders and environmentalists who have condemned it as a desecration of a sacred American landscape. The $40 million glass and steel platform will open to the public on March 28 when visitors will be allowed to take the lofty walk at a cost of $25 per person plus the cost of a Grand Canyon West entrance package, a total of about $75. (Photo by David McNew/Getty Images)

Foz do Iguacu, BRAZIL: Tourists watch and take pictures of the Iguazu Falls, from the Brazilian side of the Iguazu River near Foz do Iguazu, 17 January 2007. AFP PHOTO/Juan MABROMATA (Photo credit should read JUAN MABROMATA/AFP/Getty Images)

This photo taken on June 8, 2009 shows visitors (R) standing on a cantilever at the Illawarra Fly Treetop Walk tourist attraction overlooking rainforest (L) and the coastline (C) of the Illawarra region south of Sydney in Australia's New South Wales (NSW) state. The Illawarra region of NSW is given it's special character with the way the escarpment meets the sea with visitors to the Treetop Walk given a unique view from high above the tree-tops. AFP PHOTO / Greg WOOD (Photo credit should read GREG WOOD/AFP/Getty Images)

CHICAGO - JULY 01: Visitors check out the view from the Ledge, a new glass cube that juts out from the 103rd floor Skydeck of the Sears Tower, during a media preview July 1, 2009 in Chicago, Illinois. The 1,353 foot high observatory will open to the public tomorrow. (Photo by Scott Olson/Getty Images)

TICINO - Terrazza panoramica di Cimetta con vista su Cardada e il Lago Maggiore, Ticino. Aussichtsterrasse in Cimetta mit Sicht auf Cardada und den Lago Maggiore, Tessin. Terrasse panoramique de Cimetta avec vue sur Cardada et le Lago Maggiore, Tessin. Panoramic viewpoint in Cimetta with view on Cardada and the Lago Maggiore, Ticino. Copyright by Ticino Turismo Byline: swiss-image.ch/Christoph Sonderegger