148 feet long and in the middle of a verdant forest.

This former tuberculosis research hospital endeavored to cure the dreaded disease with fresh air and positive attitudes.

This abandoned amusement park was built on a site with a dark history.

Home of an evil witch famous within southern folklore.

The world's longest known cave system.

A bizarre roadside attraction and the first instance of miniature golf in the world.

Railroad came. People came. Railroad left. Town died.

A curious whirlpool formation supposedly capable of entangling or engulfing branches, tree trunks, or whole rafts full of hapless tourists.

Visit this playground of waterfalls, caves and sinkholes.

Moonbows over Kentucky.

For two weeks every June, fireflies in the Smoky Mountains perform an astonishing light show.

This boulder stays on its mountain thanks to a huge chain and on the map due to local legend.

Site of a former hidden treehouse in New Orleans.

This structure among the trees was the result of divine inspiration.