HOLL-GROTTEN. 501/4x351/2 inches. Condition B+: minor repaired tears and creases in margins. Paper. Two visitors are admiring the exotic, colorful, subterranean wonderland of this Swiss grotto. Discovered at the end of the 19th century, the "Hell Grottoes" are a series of limestone caves located near the city of Baar (approximately 10 miles from Zurich). Small lakes, stalagmites and stalactites of various colors give each cave its own unique character.
