Cave of the Mounds, a natural limestone cave located near Blue Mounds, Wisconsin, USA, is named for two nearby hills called the Blue Mounds. It is located in the southern slope of the east hill. The cave's beauty comes from its many varieties of mineral formations called speleothems. The Chicago Academy of Sciences considers the Cave of the Mounds to be "the significant cave of the upper Midwest" because of its beauty, and it is promoted as the "jewel box" of major American caves. In 1988, the United States Department of the Interior and the National Park Service designated the cave as a National Natural Landmark.

The House on the Rock, originally opened in 1959, is a complex of architecturally unique rooms, streets, gardens and shops designed by Alex Jordan, Jr. It is located south of Spring Green, Wisconsin and is a regional tourist attraction. The "house" itself is atop Deer Shelter Rock, a column of rock approximately 60 feet tall, 70 feet by 200 feet on the top, which stands in a forest nearby. Additions were made to the original structure and other buildings added over the course of several decades. The complex now features "The Streets of Yesterday", a re-creation of an early twentieth century American town; "The Heritage of the Sea", featuring nautical exhibits and a 200-ft model of a fanciful whale-like sea creature; "The Music of Yesterday", a huge collection of automatic music machines; and what the management bills as "the world's largest indoor carousel", among other attractions.