It's a fascinating enigma.

Meaning

It's a mysterious and captivating puzzle.

Examples

• John: 'The disappearance of the painting is a fascinating enigma.'<br>
• Alice: 'Indeed; the police seem baffled.'
• John: 'It's a topic that has captivated scholars for centuries.'
• Alice: 'The origins of the ancient civilization remain a fascinating enigma.'<br>