Natural Areas
EcoIndiana has hundreds of pages devoted to Indiana's natural areas. I'll add more as time allows. In the meantime, I've attempted to organize this mass of material in several different ways. I hope at least one of them works for you.
Alphabetical List of Natural Areas
Includes EcoIndiana pages about specific natural areas, and links to information about the natural areas that are available on the websites of land trusts, the Indiana Department of Natural Resources, or other organizations that own or manage the properties.
A directory of all 92 Indiana counties. Following the link to a county will take you to lists of natural areas, environmental organizations, and watersheds in each county. Might be useful if you're looking for natural areas in a smaller part of the state and don't want to wade through a massive state-wide list.
A simple list Indiana State Parks with visitor counts and links to more information.
Indiana's National Natural Landmarks
Another simple list with links to more information about a few these amazing places.