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