About 150 neighbors from the Hideaway Hills subdivision sued the state for $45 million to cover the value of their homes and legal costs after giant sinkholes opened.

Sinkholes are fairly common, due to collapsed caves, old mines or dissolving material, but the circumstances in South Dakota stand out, said Paul Santi, a professor of geological engineering at

Stuart and Tonya Junker loved their quiet neighborhood near South Dakota's Black Hills — until the earth began collapsing around them, leaving them wondering if their home could tumble into a gaping

Families in a South Dakota neighborhood are fearing for their safety as sinkholes have appeared around their homes in the area above an old underground mine.