The Bara Imambara is an architectural masterpiece and one of Lucknow's most iconic landmarks. Built by Nawab Asaf-ud-Daula in the late 18th century, this grand monument features a sprawling labyrinth, intricate decorations, and an impressive central hall that remains one of the largest unsupported structures in the world. The adjoining Chota Imambara and the stepwell (Baoli) add to the complex's historical and architectural significance.