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Photo: Photo taken in 1998 by Wikipedia user Soakologist. No rights claimed or reserved., Public domain via Wikimedia Commons
Once the tallest building in the world, the Sears Tower (officially renamed the Willis Tower) now has to settle for second-highest in the Americas alone, behind New York City's One World Trade Center (and even those are after a semantic battle with Toronto and the CN Tower). The Hancock Observatory (see Near North) has a nicer view of the city, but the Sears Tower offers an incredible view of its own from "The Ledge", which lets visitors walk out in a transparent balcony suspended 1,353 feet above the street. To avoid the crowds, visit after 4PM.
The Willis Tower, formerly known and still commonly referred to as the Sears Tower, is a 110-story, 1,451-foot (442.3 m) skyscraper in the Loop of Chicago, Illinois, United States. Designed by architect Bruce Graham and engineer Fazlur Rahman Khan of Skidmore, Owings & Merrill (SOM), it opened in 1973 as the world's tallest building, a title that it held for nearly 25 years. It is the third-tallest building in the Western Hemisphere, as well as the 26th-tallest in the world. Each year, more than 1.7 million people visit the Skydeck, the highest observation deck in the United States, making it one of Chicago's most popular tourist destinations. Due to its height and location, the tower is visible from a great distance. The building has appeared in numerous films and television shows set in Chicago.
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961 ft. For a time this was the tallest building in the world without an official name, although locals know exactly what to call it: The White Castle Building. It is distinctive for its "crown," which is brightly illuminated at night. If you are nearby, head into its lobby to see its enormous indoor garden and fountain.
1007 ft. Built by Adrian Smith in 1989, the granite-clad AT&T Corporate Center is one of the city's more distinctive skyscrapers for its massive size, spiked roof pinnacles, and a style evocative of both Gothic and Japanese architectural styles. It's not well-known, but it is the eighth tallest building in the U.S.
Sullivan/Holabird & Roche, 1898-1902
Louis Sullivan designed the northernmost (18) of the three buildings here, and the team of Holabird & Roche added the next two (24 & 30). The roots of Mies-style modernism are easily apparent in the immaculate proportions here, although Sullivan's piers overflow like water-pipes with ornament at the top, and Holabird & Roche's two make an interesting contrast with the master.
Burnham & Root, 1888
The Rookery is gorgeous to the point of absurdity, with delight to be found in details in the rustic lower walls and the triumphant upper walls. (Note the helpful street names carved in the corners.) Named for pigeons' habit of roosting in the then-new skyscrapers, this was the first Loop building to be granted preservation status in 1972. The lobby was remodeled in 1907 by enfant terrible Frank Lloyd Wright, adding his own touch to the interior.
The 4th Floor Visitor Gallery is temporarily closed.
Currency wonks can study various denominations and practice counterfeit detections. Guided tours every day at 1PM.