A Great Season for Mosses in the Pacific Northwest

The New York Times featured an article recently about the plethora of mosses growing in the Seattle area. A rainy winter and spring have produced a great environment for the mosses this year. One of the folks interviewed for the article works at the Bloedel Reserve on Bainbridge Island, near Seattle. They mention that this reserve "claims to have the largest moss garden on the continent". I noted in particular that they categorized this as a claim rather than a statement of fact. Maybe because they don't actually tell you how many acres the moss garden covers? Or no one is keeping a tally of the contest for largest moss garden in North America, so they can't quite be sure? If there was a contest with a reward rather than bragging rights only we might know if there is a larger moss garden out there.

Know of any other large moss gardens in North America? Or abroad?