The southernmost pristine glacial lake in the United States, Lake Lacawac is an important center for ecological research. It’s surrounded by a nonprofit nature sanctuary that’s popular with hikers and walkers; trails range from the quarter-mile Meadow Trail to the relatively strenuous Big Lake Trail, almost 3 miles long. The sanctuary is also home to the 1903 Great Camp, the former estate of coal-baron congressman William Connell. Free hour-long educational tours of
the sanctuary and the Great Camp are conducted every Wednesday and Saturday at 1 pm.