Natural Bridge State Park is home to the only natural white marble arch in North America. According to geologists, the park's namesake natural bridge, made of 550 million year-old bedrock marble, was carved into its iconic arch by the forces of glacial melt water over 13,000 years ago. Today, the bridge spans the bubbling Hudson Brook as it twists and tumbles through a steep 60-foot gorge--one of the best demonstrations of glacial erosion in New England.

Inside the park, visitors can also tour an abandoned marble quarry and check out a man-made white marble dam--also the only one in North America.