What is the large white structure above the tomb of the unknown soldiers?

The large white structure above the Tomb of the Unknown Soldier is known as the Tomb of the Unknown Soldier itself, often referred to as the Tomb of the Unknowns. Located at Arlington National Cemetery, it is a memorial dedicated to unidentified American soldiers who died in combat. The tomb is marked by a white marble sarcophagus and features a sentinel who performs a ceremonial guard duty, symbolizing honor and respect for those who have sacrificed their lives for the country.