It's hard by today's standards to envision a big game hunter as any sort of conservationist or environmentalist, but Teddy Roosevelt was both. One of the first, and certainly one of the most influential leaders of a conservation movement:
According to the National Geographic, the area of the United States placed under public protection by Theodore Roosevelt, as National Parks, National Forests, game and bird preserves, and other federal reservations, comes to a total of approximately 230,000,000 acres or about 84,000 acres per day!
Sagamore Hill, his home in Oyster Bay, offers a small museum dedicated to his life and accomplishments as well as a great short nature walk that takes you directly to the shore and offers glimpses of a crazy eccentric Asian palace mansion next door.
There also hourly tours of the home itself, which we just missed on our visit, but plan to return for.