Requirements:

Earned by visiting every marked mine in Harriman.

Explanation:

The variety of mines in the park drew the attention of some the earliest Harrimaniacs as being one of the features that makes Harriman such a unique place. Most of the mines were iron mines, but there were also a handful of mines seeking other resources. Many of the mines are now flooded, but some are more accessible and some are even large enough to enter. By completing this assignment a Harrimaniac has seen all of the forms that Harriman mines can take. Mines that are flooded need only be seen to complete this assignment. A Harrimaniac need only visit one opening in the case of a mine with multiple openings or pits.