I am guessing this may be old news, but the ranch where Palace Cave is located is for sale.
http://www.jlockhartrealestate.com/FallingWatersRanch.html Also, According to the link below, this ranch near Carta Valley, has 2 caves "The Name Cave" and "Fallen Stalagmite Cave." ( Stalagamite ?? ) http://homes.trovit.com/index.php/cod.frame/url.http%253A%252F%252Fwww.landwatch.com%252Fdefault.aspx%253Fct%253Dd%2526pid%253D200376585%2526utm_medium%253Ddatafeed%2526utm_source%253DGen/id_ad.1r1A1peK1E1h1n/what_d.carta%20valley%20ranch/type.1/origin.2/section.1/section_type.1/pop.1 All you have to do is type a cave name in one of these ranch for sale web-sites and surf around, and you might stumble on to something interesting. David Locklear