I don't know if they are as big but when I was growing up there were still blimp hangars up at NAS Tillamook, Oregon
"The huge hangar visible from Highway 101, 2 miles south of Tillamook, is the largest clear-span wooden structure in the world. The Museum covers the history of NAS Tillamook and lighter-than-air technology and houses the largest collection of flyable warbirds in the Pacific Northwest. The handicap accessible museum also offers an aviation gift store, a restaurant serving lunch daily, a theatre and a new exhibit hall. There is plenty of free parking, outdoor picnic area, dog walk area, telephones and restrooms." (
http://www.u-s-history.com/or/t/tillanas.htm)
If you go you have to go to the dairy, too.