最高级是the most beautiful ，中文意思是，最美丽的

Rapunzel grew into the most beautiful child under the sun.

莴苣姑娘长成了天底下最美丽的孩子。

He thought whales were the most beautiful animals.

他认为鲸鱼是最美丽的动物。

Tell us about the most beautiful spot on the earth.