A Chicago architecture walking tour usually means spending two to three hours on your feet in the Loop and nearby areas, looking up at skyscrapers while a guide explains how the city basically invented modern architecture after the Great Fire. Expect a mix of exteriors, a couple of lobby visits, and plenty of stories about steel frames, Frank Lloyd Wright, and Mies van der Rohe. It's genuinely interesting if you like buildings, but you'll be standing a lot and staring upward in all weather. Groups are typically 10-20 people moving at a leisurely but steady pace.
The best time is late spring through early fall (May to October) when daylight is long and temperatures are comfortable. Summer can be hot and humid, so bring water. Expect to pay around $40-70 per person for a standard group tour; private or smaller tours run higher. Boat tours that combine architecture with a river cruise usually cost more but give your neck a break.
Pick a tour that includes interior access if you can—seeing the lobbies and atriums makes it worth it. Skip the super-cheap generic ones that just point at buildings without much depth. Wear comfortable shoes and bring sunglasses; the glare off all that glass is real.
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