Complex sentence: Due to its location and size, it is a part of a large number of unique geological regions, including the piney woods of East Texas, the plains in the Panhandle, the mountains in far West Texas, and hundreds of miles of coastline.
Split into simpler sentences: Due to its location and size, it is a part of a large number of unique geological regions. From the piney woods of East Texas, plains in the Panhandle, mountains in far West Texas, and many hundreds of miles of coastline.