Medicine Wheel =
Between 70 and 150 medicine wheels have been identified in South Dakota, Wyoming, Montana, Alberta, and Saskatchewan.
Wikipedia: In some Native American cultures, the medicine wheel is a metaphor for a variety of spiritual concepts. A medicine wheel may also be a stone monument that illustrates this metaphor. Historically, the monuments were constructed by laying stones in a particular pattern on the ground oriented to the four directions. Most medicine wheels follow the basic pattern of having a center of stone, and surrounding that is an outer ring of stones with “spokes” (lines of rocks) radiating from the center to the cardinal directions (east, south, west, and north). These stone structures may or may not be called “medicine wheels” by the people whose ancestors built them, but may be called by more specific terms in that nation’s language.
Medicine_Wheel/Medicine_Mountain_National_Historic_Landmark – Wikipedia