"There's just so many candles and we're like no more candles," says Sky Casto, a Boonsboro High School student and volunteer.
Casto has seen the magnificent display in her backyard of Sharpsburg for years but this year she's volunteering. She's one of the hundreds of volunteers who are preparing for its 24th annual memorial illumination.
Each candle represents a soldier who was either wounded, killed, or lost during the Battle of Antietam. There are about 23,000 candles put in small paper bags for the illumination.
"We are doing a memorial so we remember so people understand why these people sacrificed their lives for the freedoms we enjoy today," says Georgene Charles the founder and organized of the 24th annual Antietam National Battlefield Memorial Illumination.