Macro and micro: large chambers, passageways, and formations, from various caves in the United States.
FormationsChambersFormation GrottoMamalariesViewing WindowUnderground MoonscapeButtered PopcornWet Way CrawlYahoo Cave PearlsGypsum SwirlWhite StalsThe Boat PoolCaramel FallsAragonite FlowersDraperies and DropsGyspum Needle'The Big Room'Mini Flower FormationsGeology LayersWet CrawlRimstone Room