MNN Galleries

14 amazing sinkholes

By: Laura Moss on Dec. 6, 2016, 4:26 p.m.
Speedway sinkhole in Charlotte

Photo: Charlotte Motor Speedway

3 of 16

Speedway sinkhole

A sinkhole formed in the infield of the Charlotte Motor Speedway in North Carolina in September 2010 when a 30-year-old drainpipe deteriorated 35 feet underground. The speedway was built atop an old landfill, and heavy rains contributed to the underground collapse.