
Black Diamond Mines Regional Preserve: Historic Mine Tours and Hiking Trails in Antioch CA
Nestled in the heart of Antioch, CA, the Black Diamond Mines Regional Preserve offers an enriching glimpse into the past. Renowned for its historic mine tours, visitors are invited to delve deep into the earth, discovering the well-preserved remnants of a thriving 19th-century coal and sand mining industry. Above ground, an abundance of hiking trails […]












