The public beach at Wakonda State Park in La Grange was open, but swimming was not recommended due to the level of E. coli concentrations.

Thousand Hills State Park superintendent Ryan Persinger poses next to one of the park’s cabins. The flat, square light built into the cabin’s awning behind him produces less light pollution ...

Take the cabins at Thousand Hills State Park near Kirksville, Missouri. Until recently, globe-shaped fixtures with bright white bulbs lit up each door.

Shepherd of the Hills State Park is more than one thousand acres of land that includes the creek and glades, both vital parts of the ecosystem that groups like the Sierra Club want to protect for ...