Zacatacos (address and info)
What you're getting: Steak tacos
The first location, of what's now a handful, opened up in 1996. To this day the steak is still being cooked the same way -- over open flames before being loaded into a tortilla. The fact that there's most always foot traffic means your steak won't be sitting for long after it's finished grilling -- resulting in a worthy taco for this list.
Antique Taco (address and info)
What you're getting: Pork carnitas
In the land of designer tacos, these are maybe the best. Well-fried hunks of pork are rubbed with a tamarind glaze and topped with bacon, spinach, onion, and queso.
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Titus Ruscitti is a contributing writer for Thrillist and the man behind Chicago Taco Tour. You can join him on his taco-specific travels throughout the cityscape there, or his general food ones on his blog, where he's single-handedly tackled close to 1,000 food stops. Follow him @chibbqking.