astounding
adj. B2 Upper Intermediate US //əˈstaʊndɪŋ// UK //ɐstˈaʊndɪŋ// as·tound·ing
adj. causing great surprise or wonder. You use it when something is much better or more impressive than you expected.
adj. causing great surprise, admiration, or wonder; extremely impressive. Typically used attributively before a noun or predicatively after a linking verb.
The view from the top was astounding.
Her recovery from the accident was astounding to the medical team.
The sheer scale of the ancient ruins left the visitors with an astounding sense of history and human achievement.