Any of the Wonders of the World.

Something that causes amazement or awe; a marvel.

Something astonishing and seemingly inexplicable.

Someone very talented at something, a genius.

The sense or emotion which can be inspired by something curious or unknown; surprise; astonishment, often with awe or reverence.

(UK, informal) A mental pondering, a thought.

(US) A kind of donut; a cruller.

(intransitive) To be affected with surprise or admiration; to be struck with astonishment; to be amazed; to marvel; often followed by at.

(transitive, intransitive) To ponder; to feel doubt and curiosity; to query in the mind.