While there are some properties that are on this list that don't apply the credit, filtering on the 'Resort' as an amenity at hilton.com usually works. This is the direct link (hopefully works) from hilton.com/resort (half way down the page) which filters on it:

https://www.hilton.com/en/locations/...gleLink,i81646

It has nothing to do with resort fees, though most resorts on this list do, some don't, and some places that charge resort fees are not resorts for the purpose of this credit.