Kitch-iti-kipi is an oval pool measuring and is about deep with an emerald green bottom. From
fissures in underlying limestone flows 10,000 US gallons per minute (630 L/s) of spring water throughout the year at a constant temperature of . Hydraulic pressure forces the groundwater to the surface. It has yet to be discovered precisely where this enormous volume of water comes from. The spring's pool bowl is similar to other
sinkholes, except that it is connected with an
aquifer (underground stream) to nearby Indian Lake. The small spring pool was created when the top layer of
limestone dissolved away and collapsed into the cave already made by the underground water. In the crystal clear waters of the spring, ancient tree trunks with mineral-encrusted branches can be seen, as well as fish. Fish species commonly present in the spring are
lake trout,
brown trout and
brook trout. On occasion, one may spot
yellow perch and other species that move between Big Spring and Indian Lake. The name
Kitch-iti-kipi is said to have many meanings in the language of the local indigenous
Ojibwe people. Some were "The Great Water", "The Blue Sky I See", and "Bubbling Spring". Other Native Americans called it "The Roaring", "Drum Water", and the "Sound of Thunder"—even though there is total silence coming from the spring. A
kaleidoscope effect of ever-changing shapes and forms within the spring is caused by the clouds of sand kept in constant motion by the gushing waters. ==History==