COLUMBIAN CENTINEL, Boston, Massachusetts, May 25, 1822 

* Natural Bridge caverns 
* Watertown, New York
* Early Florida colony 

Page 2 has a brief report that says: "A stupendous Cavern has recently been discovered in Jefferson county, N.Y. which has been explored 100 rods"

The cavern mentioned is located at Watertown, N.Y.

Other news of the day includes: "North-West Coast" "New Colony" and more with several advertisements.