• Wind Cave National Park - Two Worlds

    Wind Cave

    National Park South Dakota

Wildflowers - Thistle

Thistle - Circium arvense, C. undulatum
Thistle - Circium arvense, C. undulatum
NPS Photo

Did You Know?

boxwork

Wind Cave is one of the longest caves in the world and has an amazing amount of a rare cave formation called boxwork. More...