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 First Day Hike in Allegany State Park 2019 Winter Snowshoe Treks at Allegany State Park 4th Annual New Year’s Day Hike For Your Health at Pfeiffer Nature Center Drawing the Basic Bird at Pfeiffer Nature Center Pfeiffer Fun at the Olean Outdoor & Rec Show