Please improve the cohesiveness of the paragraph:
The Neandertal was originally a limestone canyon widely known for its rugged scenery, waterfalls and caves. Industrial quarrying during the 19th and 20th centuries removed most of the limestone and dramatically changed the shape of the valley.
The Neandertal was originally a limestone canyon widely known for its rugged scenery, waterfalls and caves. However, industrial quarrying during the 19th and 20th centuries removed most of the limestone and dramatically changed the shape of the valley.