USS Lexington Aircraft Carrier is docked next door to the Aquarium. Took snapshots but decided not to go onboard for the tour. I remember taking a tour of a Submarine when it was docked at Navy Pier and it was depressing. It really makes you grateful to all the Navy men who live at sea for months at a time. My Dad was Navy and served on a PT boat in WWII. Life amid combat --- they all deserve a medal. I know there's more room on a ship than in my RV but 500 bunkmates!!! Need I say more.