To commemorate the sesquicentennial of the Civil War, the National Park Service and the Department of Veterans Affairs have created an online guide to the 116 cemeteries that began during the war as simple burial grounds and grew to become national memorials.

The website breaks down cemeteries by state — Virginia has the most with 18 — and includes the historical significance of each one. A map shows all of the locations across the country; click on one of the map’s icons and the name, address and cemetery guide comes up.

Three informative essays are an added bonus: Author, historian and Harvard University president Drew Gilpin Faust wrote a piece on death and dying during the Civil War; National Cemetery Administration senior historian Sara Amy Leach discussed designing the first national cemeteries; and Kelly Merrifield, a contractor with the National Preservation Institute, wrote on the evolution of the national cemeteries.