It’s amazing there’s still ANY old growth left in the east, but there are sporadic pockets of it. Here’s one close to me:
https://en.wikipedia.org/wiki/Cathedral_Pines
About 5 minutes from my house there is a small surviving grove of eastern hemlock that was spared due to the location being a steep rugged hill strewn with large boulders. It’s protected water company property now, with a picturesque series of waterfalls.