Chicago as it is today was born out of the ashes of the 1871 Great Chicago Fire, legendarily started by Mrs. O'Leary's Cow who has entered folklore, as evidenced by restaurant names and cow sculptures all over the city. On your visit, take in the amazing views over Lake Michigan or amuse yourselves at Navy Pier on the lake. Your jaw will drop when you get to the 412th floor of Willis Tower and look out over the glass observation deck, and you will fall in love with the art in Millennium Park. The aquarium is one of the best in the world as well. And finally, Chicago is famous for its theater scene, so make sure to take in a show at the Chicago Theater.