Where is America’s tallest publicly accessible underground waterfall?

Here is the question :

WHERE IS AMERICA’S TALLEST PUBLICLY ACCESSIBLE UNDERGROUND WATERFALL?

Here is the option for the question :

Tennessee
Arizona
Arkansas
Hawaii

The Answer:

And, the answer for the the question is :

Tennessee

Explanation:

[STC0015451]. Ruby Falls is the largest and deepest publicly accessible waterfall in the United States, and it is tucked away in a remote part of Lookout Mountain in Tennessee’s Cumberland Plateau. The waterfalls, which have a height of 145 feet, may be found more than 1,100 feet below the surface of the mountain. There are daily tours that are conducted in a glass elevator that lowers 260 feet into the cavern. Colored lights illuminate the waterfalls as the elevator travels through the cavern.