(Darren Youden / Flickr)

In the late 19th century, Yellowstone became the first national park in America.

Visitation started out slow, but the railroad soon changed that, making travel and therefore the park more accessible. Years later, Yellowstone would become one of the most popular destinations in the country.

Thornton Waite, author and retired project manager with Idaho National Laboratory, joined Idaho Matters to talk more about this history.