Wilhelm Hauff,
The Banished: A Swabian Historical Tale
“ It is a delightful custom of the inhabitants of the country, and also of the stranger from distant parts, to visit Lichtenstein and Ulerich's cavern on Whitsunday. Many hundreds of Swabia's children are attracted to these mountains on that day. They descend into the heart of the earth, whose crystal walls, lighted up by thousands of wax tapers, are made to reflect their sparkling beauties in numberless fantastic forms ”
