Not only is the Lincoln Park Zoo open every day of the year, it's also 100 percent free to visit. Get cozy while you check out the lions, tigers and bears, and be sure to head back in December, when the grounds are illuminated with colorful holiday lights for ZooLights.
Make it a date: Once you’re done looking at the animals, grab a bite to eat at nearby Butcher & the Burger in Lincoln Park. The house patty is less than $10, and complimentary toppings include Sriracha mayo, tomato, onion and lettuce. As an added bonus, it's BYOB, so bring along a bottle of wine to save a few more bucks.