"Be interesting to" is a commonly used phrase to describe something that captures one's attention or piques one's curiosity. However, there are several synonyms that can be used to convey the same meaning, such as "intrigue," "fascinate," "captivate," "engage," "entertain," "stimulate," "arouse interest," "garner attention," "ignite curiosity," "be appealing to," "attract," "bewitch," and "enchant." These words can be used interchangeably, depending on the context and tone of the sentence. By using synonyms, you can add variety to your vocabulary and make your writing or conversation more interesting and engaging.