Scientist Pete Kelsey and his team have 3D-mapped the entire island of Alcatraz, discovering Civil War secrets, prisoner escape routes – and looking at ways to preserve the island for the future.

Alcatraz had been used to house prisoners since ... declaring it indigenous land per the 1868 Fort Laramie Treaty. On ...

The federal government built the Pacific Coast’s first lighthouse on Alcatraz in 1854, and the Army constructed a fort there, where it imprisoned Confederate soldiers during the Civil War.

just days after one was found floating offshore of Alcatraz Island. The latest two discoveries were east of Angel Island State Park on Wednesday and just off Fort Point Rock Beach close to the San ...