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.

On Sunday, April 19, all of America's 63 National Parks will be free to enter in celebration of the first day of National ...

It's time for a road trip! From Washington, D.C., to San Francisco, you can visit all the best national parks in the U.S.

When April rolls around, national parks hit their stride – bursting with color, buzzing with wildlife, and brimming ...