Hanuman went through the palaces of lanka to see if sita is there. He was extremely impressed with the beauty of Ravanas palace. It looked like an ornament.

He searched for Sita in the palaces of Kumba karnan, Brahasthan, vibhishna, Viboshan. He was wonderstruck with the beauty and the prosperity of those palaces.  Finally he again entered in to the palace that appeared like the home of Lord shiva, a place of Kuberan.