Vintage Ruby Falls Lookout Mountain Caverns Chattanooga TN Postcard Unused. Postcard may have some signs of normal wear associated with vintage postcards. This can include creases, stains, and bent corners. This post card is free from writing and is unposted. Please carefully view all pictures for further information about condition and appearance. Please enquire about combined shipping for postcards prior to purchase. Postcard is standard size 5.5" x 3.5" Thank you!