Step 1 : Introduction to the question "What is the second oldest tourist attraction in the United States?"
Mammoth Cave National Park is a U.S. national park in central Kentucky, encompassing .... The Echo River Tour, one of the cave's most famous attractions, used to take visitors on a .... This line transported tourists to Mammoth Caves until 1886, when he .... R. Taylor Hoskins, the second Acting Superintendent under the old ..., It is the second, ... educate historic markers historic sites colour image destinations outside tourist attractions day time ... Mammoth Cave Railroad ran nearby. Passages found in 1936 doubled the length of the cave. It is the second-oldest show cave in Kentucky and the fourth-oldest continuously visited commercial cave in the United States., Mammoth Cave Railroad ran nearby. Passages found in 1936 doubled the length of the cave. It is the second-oldest show cave in Kentucky and the fourth-oldest continuously visited commercial cave in the United States. ... historic, marker, travel, United States of America, historical marker, USA, historical, tourist attraction, ..., Since the early 1800s, Cave City has hosted visitors to Mammoth ...