#7 Flowers Of Remembrance Day At Arlington National Cemetery: For most of the year, the only people allowed to set foot on the plaza next to the Tomb of the Unknowns at Arlington National Cemetery are the 3rd US Infantry Regiment, “The Old Guard,” who keep a vigil at the site 24 hours a day. But since 2022, the cemetery has allowed the public to enter the plaza to lay flowers at the tomb on Memorial Day, a solemn tradition dubbed Flowers of Remembrance. Visitors who want to lay flowers are asked to register in advance on memorialdayflowers.org; flowers will be provided, and visitors should not bring their own. At 10 AM, cemetery historians give a talk about the history of Decoration Day (now Memorial Day) in the cemetery’s Memorial Amphitheater, followed by a walking tour.