Christina, Grant, Mimi and Papa make their way to Mount Rushmore to check out the colossal carving of four presidents? and find a mountain's worth of mystery, history, precocious prairie dogs, quirky clues, befuddling Badlands, and one Crazy Horse! One sassy sculptor! A batch of badlands! One store named Wall! Four story faces! And a Loooooong way down! 

LOOK what's inside this mystery - people, places, history and more!

PLACES: South Dakota: Mount Rushmore National Memorial - Avenue of Flags • Grand View Terrace • Lincoln Borglum Museum • Wall Drug Store, Route 90 • Sioux reservation • Custer State Park, Pierre • Prairie dog town • Peter Norbeck Visitor Center • Crazy Horse Monument and Visitor Center, Custer County.

PEOPLE: George Washington • Thomas Jefferson • Abraham Lincoln • Theodore Roosevelt • Gutzon Borglum, Sculptor • Lincoln Borglum, Sculptor • Crazy Horse, Sioux warrior • Henry Standing Bear • Korczak Ziolkowski, sculptor.