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.
Trump announced in 2001 that the skyscraper would become the tallest building in the world, but after the September 11 attacks that same year, he scaled back the building's plans, and its design underwent several revisions. When topped out in 2009, it became the fourth-tallest building in the Western Hemisphere. Trump Tower Chicago surpassed the city's John Hancock Center as the building with the highest residence (apartment or condo) in the world, and held this title until the completion of the Burj Khalifa. As of September 2015 it is the 18th-tallest building in the world and fourth-tallest in the United States.