14．Jewel Cave is the third－longest cave in the world．More than 120miles of passages have been surveyed．Calcite（［矿］方解石）crystals（水晶）that glitter（闪闪发光）when illuminated give the cave its name．
15．With more than 82miles of mapped passages，Wind Cave contains the world’s largest display of a rare formation called boxwork（蜂窝状网格）．
16．The Crazy Horse mountain carving now in progress will be the world’s largest sculpture（563′high，641′long，carved in the round）．It is the focal point（焦点）of an educational and cultural memorial to and for the North American Indian．
17．Badlands National Park consists of nearly 244，000acres of sharply eroded（侵蚀，腐蚀）buttes（孤立的丘），pinnacles（山顶）and spires blended with the largest，protected mixed grass prairie in the United States．
18．Badlands National Park contains the world’s richest Oligocene（［地］渐新世）epoch（新纪元，时代）fossil beds，dating 23to 35million years old．
19．Sage Creek Wilderness is the site of the reintroduction of the black－footed ferret（白鼬，雪貂），the most endangered land mammal（哺乳动物）in North America．
20．The name“Black Hills”comes from the Lakota words Paha Sapa，which mean“hills that are black”．Seen from a distance，these pine－covered hills，rising several thousand feet above the surrounding prairie，appear black．
21．In 1898，the first commercial timber（木材，木料）sale on Federal forested land in the United States was authorized in the area of Jim and Estes Creeks（near the town of Nemo）．
22．Woonsocket is known as The Town with the Beautiful Lake．Lake Prior sits in the middle of town．
23．Harney Peak，at 7242above sea level，is the highest point in the United States east of the Rockies（洛矶山脉）．
24．The 9824－acre Black Elk Wilderness in the center of the Norbeck Wildlife Preserve was named for Black Elk，an Oglala Lakota holy man．
25．Sturgis is home of the annual Black Hills Classic Motorcycle Rally．
26．The Mammoth（［古生］猛犸，毛象）Site of Hot Springs contains the largest concentration of Columbian and woolly mammoth bones discovered in their primary context in the world！This National Natural Landmark is the only in－situ（bones left as found）display of fossil mammoths in America．
27．The Pioneer Auto Museum in Murdo details more than 250rare automobiles including the infamous Tucker and Edsel．
28．Near the shore of Lake Herman，Prairie Village includes the original townsite of Herman，Dakota Territory．It is also home of the Art B．Thomas Hershell－Spillman Carousel that is complete with its operating coal fired boiler and steam engine（蒸汽机）．
29．The abundant water flow of Spearfish（旗鱼）Creek favored the establishment of a Federal Fish Hatchery（孵卵所）in 1898．It is known today as the D．C．Booth Historic Fish Hatchery．
30．Sioux Falls exists as a city today because the land speculators who staked town site claims there in 1857came in search of the cascades（小瀑布）of the Big Sioux River．
31．Mitchell is the home of the world’s only Corn Palace．
32．The Flaming Fountain on South Dakota State Capitol Lake is fed by an artesian well（自流井，喷水井）with natural gas content so high that it can be lit．The fountain glows（发光，发热）perpetually as a memorial to all veterans．
33．The George S．Mickelson Trail is South Dakota’s premier rails－to－trails project．This award winning tail stretches 114miles from Deadwood to Edgemont．