Answer:
Nothing beside remains
Explanation:
The situational irony arises when the expected thing does not happen and the actual thing which happens is beyond the expectation. In the poem "Ozymandias" the phrase 'nothing beside remains' is an example of situational irony. In reality, the sculpture of Ozymandias was constructed to display the strength and never-ending power of the mighty king, but in reality, the sculpture had broken and have been ruined.