This image is a view inside the large cave complex, featuring an assortment of stalagmites and some smaller stalactites. Several have merged over the eons into continuous columns of stone.

The description states:
ONYX COLLONADE IN MAMMOTH CAVE
Mammoth Cave National Park, Kentucky
Stalagmites, stalactites, and columns are among the varied and interesting features of Mammoth Cave.
–These images can often make it difficult to identify up and down, but the ‘melted ice cream’ effect on the central column clearly indicates the downward flow of the mineralized water. This card dates from the 1950s.

This card begins a series of images of Kentucky, beginning with several of the Mammoth Cave complex. It is part of the Mammoth Cave National Park, located in central Kentucky.

The description states:
MAMMOTH CAVE SOUVENIR SHOP
On Highway 70 At The National Park Boundary Line. The largest Souvenir Shop in Kentucky. Displays the largest and best collection of Cave Formations in the world. A full line of Curios and Gifts, featuring: Post Cards, Folders, Pennants, Pillows, Leather, Wood, China, Pottery, Indian Relics, Hand Carved Onyx, Natural Cave Formations, Cave and Indian Jewelry and Kentucky Baskets. Mail orders given special attention. When touring Kentucky, visit the Mammoth Cave Souvenir Shop, Mammoth Cave Road at Park Entrance.
Address: Mrs. L. A. Ferguson
Cave City, Kentucky
–The car shown in this image inidcates this card is from the 1950s.