Marking National Natural Landmark

I became aware of “National Natural Landmark” designation applied by National Park Service to selected natural sites, for example:
https://en.wikipedia.org/wiki/List_of_National_Natural_Landmarks_in_Florida

Is there a way to tag/search these in OSM?

I am aware of “National Historic Landmark” and “National Registry of Historic Places” designations, but these fall into historical/heritage (not natural) category:
https://wiki.openstreetmap.org/wiki/Key:heritage#United_States
https://wiki.openstreetmap.org/wiki/Proposed_features/heritage#Abbreviations