Visit Chicago!
http://www.discoverillinois.org/
http://www.choosechicago.com/
http://chicagoist.com/2013/06/12/the_best_chicago_tourist_spots_loca.php

Things to do
http://www.broadwayinchicago.com/chicago-tourism.php
http://www.choosechicago.com/things-to-do/
http://www.navypier.com/

Dine
http://www.opentable.com/chicago-restaurants
http://www.chicagomag.com/dining-drinking/