Understanding Ominous in Context

In the story, Samuel found himself in a perplexing situation. He had recently inherited an enormous mansion from an unknown relative, which intrigued him immensely. As he explored the vast halls, he came across a peculiar painting that seemed to follow him with its eyes. Realizing the mansion held secrets, he was both excited and apprehensive about uncovering the truth behind his inheritance.

While pondering this, he mused, 'This place feels simultaneously

inviting and ominous, an odd contradiction that keeps me on edge.'