The tour company offers specials and freebies including a Chicago treat bag with the city’s famous Garrett Popcorn. Operates daily year-round, it makes stops every 20 to 30 minutes between 9 am and 4 pm at 12 top attractions. Board at any stop, including Navy Pier, Water Tower and Millennium Park. Adult 24-hour pass $39; 48-hour pass $49; three-day pass $52; children 5-15 $19 for up to 72 hours; children under 5 free on all tours. Online specials available.