Obviously, these are highly subjective categories, but the transcendent quality of these places needed a certain subjective, perhaps spiritual, response. Although historic and scientific information is included in this guide, this guide is intended to be an experiential guide. We traveled over 9,000 miles to qualify the sites included. This guide represents the highest-rated sites. Most of the sites can be visited for free, or for a small admission.
State parks require a fee that can be in the form of an annual pass for all state parks.
The public may view all of the sites listed here. Some can only be viewed outside, usually due to antiquity. Various rules of conduct are appropriate for various sites. For example, some churches may require formal dress. Silence is appropriate at most sites, especially at Native American effigy mounds.