The world's largest panoramic relief is located at the shore temples of Mahabalipuram (or Mamallapuram) in India. They are known for their historical elegance. There were originally seven temples, out of which Six were destroyed by the destruction caused by the sea. The only one remaining along with the nearby sculptures is considered as the World's largest panoramic sculptural relief and is declared by the United Nations as a World Heritage Site.
I hear "is" mentioned, so I'm pushing in for the consideration of the Mount Rushmore in South Dakota, USA...as my entry!