Sinkhole survivors tell about their terrifying experience while others mourn the loss of family and homes. Geologist Matthew Kirby investigates the causes of Florida's Sinkhole Alley and maps aquifer tunnels with the help of divers and a cave cartographer.Kirby teams up with a top Hollywood special effects company to simulate the lethal power of nature's most terrifying death trap: Sinkholes!

Streaming video file encoded with permission for digital streaming by Infobase on April 18, 2015.

Introduction: Sinkholes --(2:31) -- Sinkhole Alley -- (3:59) -- Types of Sinkholes -- (1:07) -- Sinkhole Survivor -- (2:44) -- Florida's Limestone Karst -- (1:45) -- Divers Help Map Bedrock Caves -- (4:47) -- Housing Boom -- (4:35) -- Continual Erosion -- (1:25) -- Sinkhole Tragedy -- (4:28) -- Recreating Sinkhole Dynamics -- (3:20) -- Replicating a Sinkhole Fall -- (2:35) -- Street Collapse -- (4:06) -- Lethal Car Drop -- (3:51) -- Bedroom Drop -- (2:00) -- Effect of Agricultural Irrigation -- (1:31) -- Devil's Den -- (1:15) -- Ways to Prevent Catastrophe -- (1:36) -- Credits: When The Earth Swallows You -- (0:16).