EXPLORE: Will you be exploring Pennsylvania at all this summer? There are a lot of places to stop and visit, free of charge.

The Westmoreland Museum of American Art is a free art museum in Greensburg, a suburb of Pittsburgh roughly 45 minutes from the city. Devoted to American art, the museum has a particular concentration on the art of southwestern Pennsylvania in portraits, paintings, sculpture, Fraktur folk art and more.

In Donora, 20 miles south of Pittsburgh along the Monongahela River, is the Donora Smog Museum. “Located in the heart of Donora at the corner of McKean Avenue and Sixth Street, the museum has permanent exhibits related to the founding of the town, town life, steel mills, the 1948 Smog tragedy, Donora schools and sports, social clubs and organizations, and a 1948-time capsule room.” The 1948 tragedy was the worst air pollution disaster in U.S. history, an “air inversion of smog containing fluorine that killed 20 people.”

In Upper Nazareth stands a museum that musicians would love. It’s the C.F. Martin & Co. Guitar Museum. “From the earliest known Martin guitar to the world famous Dreadnought, the Martin museum has well over a hundred guitars on display. Whether you want to look at antique gut string models, an ultra-rare 1930 OM-45 De Luxe or Kurt Cobain’s D-18, we have almost two centuries of the finest hand-built guitars on display.” The company was founded by Christian Frederick Martin, who was born in 1796 in the German town of Markneukirchen.

Is your family more the outdoorsy type? Visit the Arboretum at Penn State University. It’s a significant green space located adjacent to the University Park campus in State College. It includes the H.O. Smith Botanic Gardens, which is a part of the arboretum.