Final answer:
The Shawnee Hills region in Illinois is known for its hilly terrain and sandstone cliffs, attracting visitors for hiking. Stone quarrying is a common activity in the region. However, the statement about the region being swampy with trees like cottonwood is false.
Explanation:
Visitors here enjoy hiking in the sandstone and limestone cliffs in the Shawnee Hills region. This region of Illinois is indeed hillier than most of the state. People dig stone from quarries here to use for building, which is a common practice in the area. However, the statement about this region being swampy with trees such as cottonwood is NOT true as the Shawnee Hills region is not characterized by swamps.
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