Please read the following table in HTML format from a webpage and then answer the question in detail according to the table. Each table cell is defined by a <td> and a </td> tag. Each table row starts with a <tr> and ends with a </tr> tag. 'rowspan=m' and 'colspan=n' represents a cell spaning over 'm' rows and 'n' columns.

Webpage title:
Foothills Parkway
Table title:
Major intersections
Table:
<table id='hittask' contenteditable='False'>
<tr> <th colspan=1 rowspan=1 > County </th><th colspan=1 rowspan=1 > Location </th><th colspan=1 rowspan=1 > mi </th><th colspan=1 rowspan=1 > km </th><th colspan=1 rowspan=1 > Destinations </th><th colspan=1 rowspan=1 > Notes </th></tr>
<tr> <td class="highlighted"  colspan=1 rowspan=2 > Blount </td><td class="highlighted"  colspan=1 rowspan=1 > Chilhowee </td><th colspan=1 rowspan=1 > 0.0 </th><td colspan=1 rowspan=1 > 0.0 </td><td colspan=1 rowspan=1 > US 129 (SR 115 / Calderwood Highway) – Fontana Dam, Maryville </td><td colspan=1 rowspan=1 > Western segment southern terminus </td></tr>
<tr> <td colspan=1 rowspan=1 > Walland </td><th colspan=1 rowspan=1 > 16.9 </th><td colspan=1 rowspan=1 > 27.2 </td><td class="highlighted"  colspan=1 rowspan=1 > US 321 (SR 73 / East Lamar Alexander Parkway) – Townsend, Maryville </td><td colspan=1 rowspan=1 > Interchange </td></tr>
<tr> <td colspan=1 rowspan=3 > Sevier </td><td colspan=1 rowspan=1 > Wears Valley </td><th colspan=1 rowspan=1 > 33.0 </th><td colspan=1 rowspan=1 > 53.1 </td><td colspan=1 rowspan=1 > US 321 (SR 73 / Wears Valley Road) – Townsend, Pigeon Forge </td><td colspan=1 rowspan=1 > Western segment northern terminus </td></tr>
<tr> <td colspan=1 rowspan=1 > Pigeon Forge </td><th colspan=1 rowspan=1 >  </th><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > US 321 (SR 73) / US 441 (SR 71) – Pigeon Forge, Gatlinburg, Great Smoky Mountains National Park </td><td colspan=1 rowspan=1 > Future interchange (unfunded) </td></tr>
<tr> <td colspan=1 rowspan=1 > Pittman Center </td><th colspan=1 rowspan=1 >  </th><td colspan=1 rowspan=1 >  </td><td colspan=1 rowspan=1 > SR 416 (Pittman Center Road) </td><td colspan=1 rowspan=1 > Future interchange (unfunded) </td></tr>
<tr> <td colspan=1 rowspan=2 > Cocke </td><td colspan=1 rowspan=1 > Cosby </td><th colspan=1 rowspan=1 > 0.0 </th><td colspan=1 rowspan=1 > 0.0 </td><td colspan=1 rowspan=1 > US 321 / SR 32 (Cosby Highway) – Gatlinburg, Newport </td><td colspan=1 rowspan=1 > Eastern segment southern terminus </td></tr>
<tr> <td colspan=1 rowspan=1 > ​ </td><th colspan=1 rowspan=1 > 5.6 </th><td colspan=1 rowspan=1 > 9.0 </td><td colspan=1 rowspan=1 > I-40 – Knoxville, Asheville </td><td colspan=1 rowspan=1 > Eastern segment northern terminus; I-40, exit 443 </td></tr>
<tr> <td colspan=6 rowspan=1 > 1.000 mi = 1.609 km; 1.000 km = 0.621 mi Unopened </td></tr>
</table>
Question:
What is the first major geological structure visible when approaching the mountains via Lamar Alexander Parkway (U.S. 321) and which county is the structure in?
Answer:
Chilhowee Mountain, located in Blount County is the first major geological structure visible when approaching the mountains via Lamar Alexander Parkway (U.S. 321).