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Photo: TonyTheTiger, CC BY-SA 3.0 via Wikimedia Commons
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.
The Franklin Center is a 60-story supertall skyscraper in the Loop neighborhood of downtown Chicago. Completed in 1989 as the AT&T Corporate Center to consolidate the central region headquarters of the American Telephone & Telegraph Company (AT&T), it stands at a height of 1,007 ft (307 m) and contains 1.7 million sq ft (160,000 m2) of floor space. It is located two blocks east of the Chicago River and northeast of the Willis Tower with a main address of 227 West Monroe Street and an alternate address of 100 South Franklin Street.
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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.
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 4th Floor Visitor Gallery is temporarily closed.
Currency wonks can study various denominations and practice counterfeit detections. Guided tours every day at 1PM.
850 ft. Located at the exact center of CTA's Loop transit system, this building is distinctive for its vertical curve. It has been renamed for each of the successive banks that have bought out its previous tenants — for example, it was the BankOne Tower until 2005. The plaza outside is more interesting than the interior — it is home to an enormous mosaic by renowned Russian painter Marc Chagall.