The Field Museum Tickets

It used to be the Sears Tower, but in 2009, London-based insurance broker Willis Group Holdings acquired the naming rights. No matter what you call it (everybody still refers to it as Sears Tower), it's an architectural icon. When it was built in 1973 it was the tallest building in the world. It's now 14th-tallest, but offers unrivaled views of the Windy City, and sees more than a million visitors each year.

The huge Shedd Aquarium is an indoor public aquarium located in Chicago, Illinois. It is home to 32,000 animals, and was at one point the biggest indoor aquarium in the world, boasting a mighty 5,000,000 US gallons of water!

The Art Institute of Chicago is one of the oldest and largest art museums in the US, attracting approximately 1.5 million guests annually. It is home to some of the world's most famous paintings including The Old Guitarist by Pablo Picasso, A Sunday Afternoon on the Island of La Grande Jatte by Georges-Pierre Seurat, Edward Hopper's Nighthawks, and Grant Wood's American Gothic, among countless other works.