Since 1930, Lost River Caverns has offered guided tours of Hellertown's underground wonderland. We offer unique views of a natural limestone cavern featuring crystal formations. Always a comfortable 52 degrees Fahrenheit. Site includes a store with souvenirs, gemstones, products for jewelry-making, metals and tools, lapidary and metal detectors. Stay for a picnic in our grove, a visit to Gilman museum, the jungle garden and gem mill. Then take a walk on a nature trail. Bring a sweater, comfy shoes, camera and your imagination.