Take the free park shuttle to the Temple of Sinewava, walk one mile to the end of the paved walkway, and begin hiking up the river. Two hours upstream, at the intersection with Orderville Canyon, hikers will encounter the narrowest and most spectacular section of the Zion Narrows.
Photograph by Mike Segar, Reuters Second City is back in second place, at least when it comes to height. New York's One World Trade Center will officially open next year as America's tallest building, topping Chicago's Willis Tower by 325 feet (99 meters). The distinction hinges on a definition. According to the Council on Tall Buildings and Urban Habitat, the needle atop the new trade center is a spire, not an antenna.
It was the tallest building in the world from completion in 1974 until 1998. The Willis Tower is the tallest building in Chicago and the tallest building in the United States west of New York City, the second tallest building in the Western Hemisphere and the 16th-tallest building in the world. 3: 432 Park Avenue: New York City