Home » Facts Building made of Extinct Wood The cabin at Pfeiffer Nature Center is made entirely of American Chestnut, which is now extinct. in Hiking Email this page Travel Guide It's a full 56-page comprehensive guide, highlighting the activities and attractions in our County and it's FREE!! View the visitor's guide online or request that the Enchanted Mountains guide be snail mailed to you for FREE! Related Events Adventure Series at Allegany State Park Annual Summer Festival at Griffis Sculpture Park Saturday Activities at Griffis Sculpture Park