Reference

In 1904, J.C. Brown, a British prospector, reportedly discovered a vast underground city beneath Mount Shasta in California. This legend claims that Brown found an extensive network of tunnels that stretched for miles, leading into a lost civilization. The city's treasures supposedly included golden tablets, inscribed plates, and various artifacts covered in hieroglyphics.

For more detailed information, you can check these sources:

• Gathering the Stories: Mt. Shasta and JC Brown's Lost City
• RationalWiki: Mount Shasta