Fortresses Like Fort Mifflin
Harrisburg Marathon
Marathon
7.69
Good
Fort Niagara
Fortress
6.90
Fair
Fort Mackinac
Fortress
6.90
Fair
Fort William Henry
Fortress
6.72
Fair
Fort Frederica
Fortress
6.26
Fair
Fort de Chartres
Fortress
5.98
Mediocre
Columbia
River
9.32
Excellent
Swarthmore College
University
9.31
Excellent
Saint Lawrence
River
9.03
Excellent
Yukon
River
9.02
Excellent
Missouri
River
8.97
Great
Mississippi River
River
8.65
Great
Colorado River
River
8.60
Great
Cornwall Iron Furnace
Watermill
8.58
Great
Westminster Burying Ground
Cemetery
8.56
Great
Potomac
River
8.49
Great
Cahir Castle
Castle
8.45
Great
McConnell's Mill
Watermill
8.37
Great
Ohio
River
8.31
Great
Susquehanna
River
8.24
Great
Upper Missouri River Breaks National Monument
Badland
8.24
Great
Kuskokwim
River
8.13
Great
Mill at Anselma
Watermill
8.13
Great
Delaware
River
8.12
Great
