Colorized view of the Onyx Columns formation in Great Onyx Cave, showing drapery-like stalactites and flowstone in blue, white, and reddish tones. The cave is within Mammoth Cave National Park.
Linen texture; no white border; printed caption in upper right; light aging.
No postmark; unused card. Divided-back C.T. Art-Colortone (Curt Teich) imprint, linen texture; small brown stain on address side. No handwriting anywhere.
Cite this card
Onyx Columns, Great Onyx Cave, Mammoth Cave National Park, Kentucky, postcard, c. 1930. PostalPast Collection. https://postalpast.com/postcard/onyx-columns-great-onyx-cave-mammoth-cave-national-park-kent. Accessed October 5, 2026.