In my opinion, Devil's Lake State Park in Wisconsin is one of the best lesser-known US state parks.Emily Hart I've traveled to all 50 states and love exploring the country's lesser-known state ...

I've traveled to all 50 states and love exploring the country's lesser-known state parks. Letchworth State Park in New York and Matthiessen State Park in Illinois have gorgeous waterfalls.

I've traveled to all 50 states and love exploring the country's lesser-known state parks. Letchworth State Park in New York and Matthiessen State Park in Illinois have gorgeous waterfalls.