Kartchner Caverns State Park
The Kartchner Caverns are massive rooms dissolved from limestone and containing remarkable mineral formations. Throne Room contains one of the world’s longest soda straw stalactites and a 58-foot high column. The Big Room contains the world’s most extensive formation of brushite moonmilk.
The cave tours at Kartchner Caverns State Park are wheelchair accessible, but there are a lot of restrictions as well as a requirement to book a tour, so be sure to call in advance. The number is 1-520-586-2283. Crutches and walkers are not allowed, so again, call to be sure a loaner wheelchair is available for you. Tours are $23 per adult. From their website: “Most above ground and below ground areas on the park are handicapped accessible excepting most parts of the hiking trails.” Here are some Google reviews for the park and its tours.
Accessibility Here is the park website.