I would be highly surprised if a U.S. location is offering this type of discount. I understand it's pretty common in some other countries, though. The U.S. does not have any kind of official national registry or way to identify "disabled" individuals, which leaves it rather questionable how to determine qualification for such a discount. As PP's suggest, I would call (I assume you are calling from overseas and that isn't ideal, but the best way to get your answer).
Enjoy your vacation!
This will be surprising (it surprised me), but actually, while it is on the west coast, The San Diego Zoo and The San Diego Zoo's Safari Park both allow the carer free admission (and free rides on the Skyride, bus tours, etc.), both the disabled person and the carer will need to stop at the ticket booth to get the free ticket, also the ticket for the disabled person can be any form of valid admission, including comp tickets, annual passes, etc.
They also will provide special assistance for those who are blind, as long as the assistance is requested at least 72 hours in advance.
There are many other places in the U.S. that do offer similar deals, I know Sea World San Diego does, but often the 50% discount for the disabled guest and the carer is not the best discount available for Sea World (always check their website, Costco, etc.), so few people use it.
NOTE: Since this has a monetary value, this is a case where proof of disability can be required.
Having previously researched this for my dad before he passed, the requirements to qualify for the discount at Sea World, at least in California, they require one of the following:
- A copy of the paperwork for a disabled parking placard and a government issued matching photo ID.
- A copy of disabled bus transit pass from a transit agency and matching government issued photo ID.
- A copy of a disability eligibility form and matching government issued photo ID (copy of disability pay stub may also be accepted)
- A government issued photo ID that identifies the person as disabled (For example in California, a non driver ID may contain this information since they may not need a disabled placard but may still need proof of disability for purposes of getting a bus transit pass, etc.)
- A notarized doctors note dated within the past 3 months MAY be accepted as well, but that is at the discretion of the person at the ticket booth.
NOTE: You will want to confirm the requirements, as these are from about 4 years ago now, but my guess is they are similar.