Complex sentence: It is interesting that from different views at different locations of Yilan County, the shape of Gueishan Island is quite different due to the curvy shape of the seashore of Yilan, circling the very island.
Split into simpler sentences: It is interesting that from different views at different locations of Yilan County, the shape of Gueishan Island is quite different. The reason for this is the curvy shape of the seashore of Yilan, circling the very island.