Museum Campus — Shedd Aquarium, Field Museum & Adler Planetarium
Museum Campus Chicago — the 57-acre peninsula extending into Lake Michigan immediately south of Grant Park, accessible by the lakefront trail and by bus — is the most concentrated collection of major natural history and science institutions in the United States, combining three world-class museums within walking distance of each other: the Field Museum (natural history), the Shedd Aquarium, and the Adler Planetarium.
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Shedd Aquarium — 32,000 Animals Including Beluga Whales
The Shedd Aquarium (1930, Museum Campus) houses 32,000 animals across 5 million gallons of water — the Abbott Oceanarium's Pacific White-Sided Dolphins perform in a 3-million-gallon naturalistic habitat with a backdrop painted to match the Pacific Northwest; the Wild Reef exhibit recreates a Philippine coral reef at 1:1 scale.
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Field Museum — Sue the T. Rex & Egyptian Mummies
The Field Museum (1921, neo-classical, 24 acres of exhibits) houses 40 million specimens — 'Sue' (the most complete and best-preserved T. rex skeleton ever found, 40 million USD, 12.8m long) dominates the Stanley Field Hall; the Egypt exhibit includes an actual intact tomb transported stone-by-stone from Egypt; admission $28 adults.
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Adler Planetarium — America's First Planetarium (1930)
The Adler Planetarium (1930, on a peninsula jutting into Lake Michigan) was the first planetarium in the Western Hemisphere — the Definiti Space Theater projects 8K digital shows on a 68-foot dome; the historic Zeiss Model II projector (original 1930 instrument) is on permanent display; the lakefront terrace offers the best Chicago skyline-from-the-water photograph.
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Lakefront Trail — 18 Miles, No Cars
Chicago's Lakefront Trail (18.5 miles, completely separated from automobile traffic) runs from Ardmore Beach (north) to Rainbow Beach (south) along Lake Michigan — it is the world's longest uninterrupted urban lakefront path; cyclists, runners, and rollerbladers share the trail; access to 24 public beaches is free; the trail handles 100,000 users on summer weekends.
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Burnham Park & Harbor — Sailboats on the Inland Sea
Burnham Harbor (31st Street, just south of Museum Campus) is one of four Chicago lakefront harbors managed by the Park District — 1,000 sailboats and powerboats are moored; the Playpen (an informal anchorage off the harbor entrance) hosts 200+ boats on summer weekends with music, grills, and swimming from boats; Chicago Sailing offers two-hour sunset lessons.
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Millennium Park — Cloud Gate & The Crown Fountain
Millennium Park (24.5 acres, opened 2004, $475 million) transformed a parking lot over rail yards into the most visited site in the American Midwest — Anish Kapoor's Cloud Gate ('The Bean', 168,000 pounds of polished steel) reflects 1,000 visitors simultaneously; Jaume Plensa's Crown Fountain (two 50-foot glass brick towers projecting Chicago residents' faces) runs May–October.