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.

There is no prison more prolific than Alcatraz, so it should come as no surprise that some of its past inmates have been equally notorious. Alcatraz Penitentiary was the country's premiere maximum ...

Armed with robots, lasers, and specialized drones, Pete Kelsey and his team 3D-mapped all of Alcatraz Island, gaining access to areas previously off limits. Over the course of 13 months, the team ...

Now, the state government is investing R$ 5 million ($870,000) to restore the island’s ruins and, above all, to stop their deterioration. The prison ... the original Alcatraz, they were ...

Alcatraz Island once housed the most notorious criminals in the U.S. Serving as a federal prison from 1934 to 1963 ... the Sutro Baths now lie in ruins. The place has witnessed mysterious deaths ...