See what factory tours may be offered in your area or where you're traveling:
www.factorytoursusa.com
to find out more about access accomodations at the US National Parks see:
US National Parks access info
To find out more about access accomodations at the San Diego Zoo see:
San Diego Zoo accessibility info
to find out more about access accomodations at the USS Midway Museum see:
USS Midway aircraft carrier accessibility info