Pin­na­cled rock for­ma­tions with vivid col­or bands, sharp-edged cliffs with tip­toe­ing bighorn sheep, and sprawl­ing colonies of fever­ish prairie dogs are just a few of the images you’ll find in South Dako­ta’s most sto­ried nation­al park. Incred­i­bly user-friend­­ly, near­ly all of its top sights lie along the 40-mile Bad­lands Loop Rd.