That's very odd and strange, making it bizarre and peculiar.

奇妙 is often used in literature to describe something that feels unusually strange or odd. It describes something being an almost otherworldly quality, sparking curiosity because it's so bizarre.

This is a jukugo word, which usually means on'yomi readings from the kanji. If you know the readings of your kanji you'll know how to read this as well.