Although I like to walk too (to photograph), I think monorails are lots of fun. Does anyone have a list of every U.S. zoo or wildlife park that has a monorail? I know two I have been on before no longer exist: Busch Gardens (Florida) and San Diego Wild Animal Park.
Yes indeed, the monorails (at least our in Dallas) are a bear to maintain, but we have a great maintenance crew for them so they are usually in working order.