Diamond Hill Management Area in Cumberland, Rhode Island is a scenic and rugged destination known for its striking quartz outcroppings and forested trails. Once a ski area, it now offers hiking, mountain biking, and birdwatching across varied terrain. The summit reaches 481 feet, with views stretching to the Boston skyline on clear days. Named for its sparkling rocks, the area blends natural beauty with historical significance, making it a perfect spot for outdoor exploration and geocaching.