- Battle of Gettysburg took place 150 years ago at a site that is now a national military park
- Don't miss a visit to the battlefield, "the reason we're all here," says ranger Caitlin Kostic
- At the dedication of the Soldiers' National Cemetery, Lincoln gave historic Gettysburg Address
CNN.com's weekly Summer in the Park series turns to rangers at the United States' most popular national parks to get insider recommendations for your visits, whether you have just one day or can stay longer. The series will run through Labor Day.
(CNN)When the Battle of Gettysburg was over after three days, the Civil War's bloodiest battle had claimed 51,000 casualties.