It usually rains 122 days per year in Chicago.
For health reasons, engineers made the Chicago River flow backwards in 1900. It does so even today.
A standard ticket for Chicago Transit Authority (CTA) costs $5.75 and is good for 24 hr.
Travelling couples can enjoy Chicago on about $175 to $400 per day.
In the mood for a pint? A half litre of beer in Chicago costs about $5.
About 6.9m people live in Chicago. It's the number 29 most populous city in the world.
Campers and hostellers can have a great time in Chicago on $90 to $100 per day.
Thirsty? A 0.33 litre of bottled water in Chicago will cost you $1.20.
The average daytime temperature in Chicago is -3°C in January and 25°C in July.
The geographical area of Chicago is 5498 sq km, ranked number 3 largest in the world.