In Lord Byron's When We Two Parted, we can observe the speaker's strong emotion by the grief he expresses upon the longing of his former lover. We can also testify of the presence of imagination in his use of allusion to the knell of the bells and how they make him feel like he dies when he hears her name. Moreover, we see the speaker finding inspiration in nature when he states that the dew of the morning foreshadowed their parting.
Therefore, the least observed feature of Romanticism is the mysterious and exotic places.