Are there any rural areas of the USA that physically look much the same way they did in the 1700s?
American cities have shaped the way their surroundings look in the two plus centuries since America became a nation. Suburban sprawl and commercial and industrial development have rendered places like Manhattan Island virtually unrecognizable as the wilderness it once was. Some of the rural areas have been changed as well, by past and current agricultural, forestry, and transportation practices.
While we try to re-create the authentic historical "feel" of battlefields like Yorktown, significant city centers like Boston, and old military facilities like Fort Sumter, Americans really don't have any large rural plots of land that have been untouched by the hand of development since 1776.... do we?
Name and describe any physically unchanged areas in the USA. How do they look? How near are they to potential threats to their status as untouched? And for the best answer, describe how they might be preserved to stay that way.