Beverly & Robert Gilman with tree ripended Bananas from the Tropical Gardens in the Lobby at Lost River Caverns,, Hellertown, Pa., on Rt. 412 just South of Bethlehem. See these wonderful Caverns with the underground Lost river and Crystal Chapel. 5 Fascinating Underground Chambers, one more Room discovered July 10, 1963 - To be opened later. See Gilman Free Museum of Rocks, Minerals, Natural History, Antique Guns, Lapidary, Gems and Jewelry. Free Picnic Park and Camp Grounds. Open Every Day & Evening all year.