This county park contains a field of unusual diabase boulders that produce bell-like metallic tones when struck, turning the rocks themselves into a natural percussion instrument. A trail from the parking area reaches the boulder field, with High Falls elsewhere in the 128-acre park; bring a small hammer if you want to test the rocks yourself.
Filed under roadside oddities: giant objects, odd monuments and things built for no clear reason.
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Source: buckscounty.gov/Facilities/Facility/Details/Ringing-Rocks-Park-5